RRB-NTPC 2016 Questions
17 Mar 2016 • Shift 1
97 Questions AvailableTake as Test
Question 1
Arithmetic
Tejasvi, Trishana and Meena are three sisters. Tejasvi and Trishana are twins. The sum of the ages of Tejasvi and Trishana is the same as that of Meena. Four years earlier, the ratio of the ages of Tejasvi and Meena was 1:3. What will be the age of Trishana 4 years from now?
A
18 yearsB
16 yearsC
12 yearsD
14 yearsQuestion 2
Arithmetic
The revised methodology from 2025 for calculating Green Credit for tree plantation requires certain thresholds before a claim can be submitted. Which is the correct eligibility pair?
A
7 years of restoration + 40% canopy densityB
3 years of restoration + 30% canopy densityC
5 years of restoration + 60% canopy densityD
5 years of restoration + 40% canopy densityQuestion 3
Arithmetic
As of December 2025, under the Pradhan Mantri Jan-Dhan Yojana (PMJDY), eligible account holders can access an overdraft facility of up to:
A
₹10,000B
₹8,000C
₹15,000D
₹5,000Question 4
Arithmetic
At what rate (in percentage, rounded off to two decimal place) per year will a sum of money 5 times itself in 15 years on simple interest?
A
26.67B
53.34C
28.67D
24.67Question 5
Arithmetic
Refer to the following letter and symbol series and answer the question that follows. Counting to be done from left to right only. (Left) T O @ $ J $ S € M L I * N G © Y & T P £ Y T (Right) How many such symbols are there each of which is immediately preceded by a letter and also immediately followed by a symbol?
A
4B
2C
1D
3Question 6
Arithmetic
A woman travelled at a speed of 20 m/min for 90 min, and at a speed of 72 m/min for 66 min. Her average speed (in m/min) for the entire journey is:
A
35B
46C
48D
42Question 7
Arithmetic
If the mean of the following data is 35, find the value of X. Class 10-20 20-30 30-40 40-50 50-60 Frequency 42 26 45 46 X
A
28B
34C
26D
32Question 8
Arithmetic
Evaluate: $(-9) - (-60) \div (-6) + (-2) \times 8$
A
-37B
-38C
-35D
-34Question 9
Arithmetic
In the given figure, lines AO and DE are parallel. What is the value of x?
A
$145^\circ$B
$45^\circ$C
$100^\circ$D
$35^\circ$Question 10
Arithmetic
Which dynasty ruled over Kannauj during the Tripartite Struggle?
A
RashtrakutasB
ChalukyasC
Palas - CholasD
Gurjara-PratiharasQuestion 11
Arithmetic
Which of the following methods was characteristically adopted by the Moderates during the early phase of the Indian national movement?
A
Boycott of foreign goods and institutionsB
Swadeshi MovementC
Promotion of Vedic educationD
Constitutional reformsQuestion 12
Arithmetic
P sells an item to Q at 70% profit. Q sells the same item to R at 67% loss. If R paid ₹3927 for the item, then at what price (in ₹) is the item purchased by P?
A
7003B
6998C
6997D
7000Question 13
Arithmetic
According to Census 2011, which of the following states showed a negative decadal population growth rate between 2001 and 2011?
A
PunjabB
NagalandC
GujratD
KerelaQuestion 14
Arithmetic
Mahesh has ₹1407 with him. He divides this amount between his two sons, Vijay and Ajay, and asks them to invest their respective shares at a compound interest rate of 10% per annum, compounded annually. It is observed that Vijay’s investment amounts to the same value after 17 years as Ajay’s investment does after 18 years. How much (in ₹) did Mahesh give to Ajay?
A
837B
670C
737D
520Question 15
Arithmetic
A copper sphere of diameter 24 cm is melted and drawn into a wire of diameter 4 mm. What is the length (in metres) of the wire?
A
456B
480C
576D
580Question 16
Arithmetic
Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/ subtracting /multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) (336, 216, 156) (379, 259, 199)
A
(432, 332, 252)B
(394, 264, 204)C
(412, 292, 232)D
(449, 329, 249)Question 17
Arithmetic
By November 2025, non-fossil power accounted for what percentage of the total installed electricity capacity in India?
A
40.20%B
45.80%C
51.50%D
60.00%Question 18
Arithmetic
Which North Indian fair, held every 12 years, is a major Hindu pilgrimage event at Prayagraj?
A
Hemis FestivalB
Kumbh MelaC
Surajkund MelaD
Pushkar MelaQuestion 19
Arithmetic
Which core component of Windows OS is responsible for handling low-level operations such as memory management and process scheduling?
A
Service Control ManagerB
Task SchedulerC
Windows ExplorerD
Windows KernelQuestion 20
Arithmetic
A cube has a lateral surface area of 324 cm². It is fully submerged in a rectangular container of height 18 cm, having a square base and a lateral surface area of 864 cm². If the container was partially filled with water before the cube was submerged, find the rise in the water level after the cube is submerged. (Round your answer to the nearst integer.)
A
6 cmB
7 cmC
4 cmD
5 cmQuestion 21
Arithmetic
Under the Citizenship Act, 1955, which section governs the grant of citizenship when a new territory becomes part of India?
A
Section 5B
Section 6C
Section 7D
Section 9Question 22
Arithmetic
Below are given two sets of numbers. In each set of numbers, a certain mathematical operation on the first number results in the second number. Similarly, a certain mathematical operation on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the question? (NOTE – A two/three-digit number cannot be broken into individual digits for operations. E.g. if 37 is followed by 10, the operation cannot be 3+7 as a two-digit number cannot be broken into individual digits.) 157 – 162 – 172 – 86 93 – 98 – 108 – 54
A
98 – 103 – 113 – 133B
112 – 116 – 126 – 63C
185 – 190 – 200 – 100D
65 – 70 – 80 – 160Question 23
Arithmetic
A is the wife of B. B is the father of C. D is the brother of C. E is the son of D. How is A related to E?
A
Father's motherB
Mother's motherC
Husband's wifeD
MotherQuestion 24
Arithmetic
Which of the following athletes clinched the women’s 100m hurdles gold at the World Athletics Championships Tokyo 2025 on 15 September?
A
Ditaji KambundjiB
Grace StarkC
Masai RussellD
Tobi AmusanQuestion 25
Arithmetic
Refer to the following letter, symbol series and answer the question. Counting to be done from left to right only. (Left) O N & # K € S * P # £ * G I & * @ I A * @ © (Right) How many such letters are there each of which is immediately preceded by a letter and also immediately followed by a symbol?
A
5B
4C
3D
2Question 26
Arithmetic
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? # : NMH :: VUP : %
A
# = SVC % = OIKB
# = IBM % = QKLC
# = SRO % = ZPKD
# = SRM % = QPKQuestion 27
Arithmetic
The ratio of three numbers is 3 : 5 : 7. If the sum of the largest and smallest numbers is 60, what is the sum of all the three numbers?
A
90B
70C
100D
120Question 28
Arithmetic
If cot A = 3/4, and A is an acute angle, then find the value of sin2A - cos3A.
A
3/125B
141/125C
237/125D
273/125Question 29
Logical
In a certain code language, ‘ROAD’ is coded as ‘9416’ and ‘DORM’ is coded as ‘3691’. What is the code for ‘M’ in the given code language?
A
6B
3C
1D
9Question 30
Logical
If a 7-digit number 54468A0 is completely divisible by 4, what is the minimum value of A?
A
3B
2C
0D
5Question 31
Logical
Which 2025 event by the United Nations highlights that member states continue to ratify a variety of multilateral treaties across human rights, the environment, penal law, and the law of the sea, among others?
A
Paris Climate SummitB
2025 Treaty EventC
UN Biodiversity SummitD
UN Ocean ConferenceQuestion 32
Logical
If 1 is added to each odd digit and 1 is subtracted from each even digit in the number 21673458, what will be the product of the greatest and smallest digit in the new number thus formed?
A
0B
9C
8D
16Question 33
Logical
Evaluate: $(-9) - (-56) \div (-14) + (-3) \times 8$
A
-40B
-36C
-39D
-37Question 34
Logical
In a certain code language, A @ B means ‘A is the son of B’, A # B means ‘A is the sister of B’, A + B means ‘A is the wife of B’ and A % B means ‘A is the father of B’. Based on the above, how is E related to B if ‘E % R # D + N @ B’?
A
Wife's brotherB
Wife's fatherC
Son's wife's fatherD
Son's wife's brotherQuestion 35
Logical
Which of the following objectives is mentioned in Article 39 of the Indian Constitution?
A
To organise agriculture and animal husbandryB
To ensure equal justice and provide free legal aidC
To promote equal pay for equal work for both men and womenD
To organise village panchayatsQuestion 36
Logical
What should come in place of ‘?’ in the given series? 64 62 59 54 47 ?
A
34B
32C
38D
36Question 37
Logical
In this question, a question is followed by two statements numbered (I) and (II). You have to decide whether the data provided in the statements is sufficient to answer the question. Read both the statements and decide the appropriate answer. A, B, C, D, E and F are sitting around a circular table, facing the centre. Who sits to the immediate right of C? (I) D sits to the immediate left of F. C is the immediate neighbour of A and E. (II) B sits second to the left of F. C sits second to the right of F.
A
Both statements I and II together are not sufficient to answer the question.B
Data in Statement II alone is sufficient to answer the question while data in statement I is not.C
Data in Statement I alone is sufficient to answer the question while data in statement II is not.D
Both statements I and II together (and not statement I alone or statement II alone) are sufficient to answer the question.Question 38
Logical
There are 12 members in group A, 73 members in group B and 80 members in group C. All the members of these groups went to a restaurant. The average amounts spent on each member of groups A, B and C are ₹184, ₹234 and ₹390, respectively. The overall average amount (in ₹) spent per member is:
A
305B
306C
311D
308Question 39
Logical
Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. Only two people have exams before Q. Only three people have exams after V. Only three people have exams between S and Q. P has the exam immediately before T but not on Monday. R does not have the exam on Tuesday. How many people have exams between R and T?
A
ThreeB
TwoC
FourD
OneQuestion 40
Logical
Which name is given to the southern stretch of the western coastal plain of India?
A
Konkan CoastB
Malabar coastC
Coromandel CoastD
Kannad CoastQuestion 41
Logical
In a certain code language, ‘WAND’ is coded as ‘1846’ and ‘GNAW’ is coded as ‘4165’. What is the code for ‘G’ in that language?
A
6B
5C
1D
4Question 42
Logical
Which mission, announced in August 2025, aims to provide India with a multi-layered indigenous air and missile defence system?
A
Mission ShaktiB
Agni Defence InitiativeC
Mission Sudarshan ChakraD
Integrated Air Defence MissionQuestion 43
Logical
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? # : NQW :: LOU : %
A
# = KKQ, % = RUAB
# = HKQ, % = RULC
# = HKQ, % = RUAD
# = HKQ, % = RUOQuestion 44
Logical
A file is selected on the desktop. Pressing the Delete key will mainly:
A
Remove the fileB
Rename the fileC
Open the fileD
Copy the fileQuestion 45
Logical
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: Some ants are lizards. All lizards are spiders. No spider is a rat. Conclusions: (I) Some rats are lizards. (II) Some spiders are ants.
A
Only conclusion (II) followsB
Neither conclusion (I) nor (II) followsC
Both conclusions (I) and (II) followD
Only conclusion (I) followsQuestion 46
Logical
Which of the following is a significant component of the Harappan citadel?
A
Grand palacesB
The Great BathC
Dwelling housesD
Huge templesQuestion 47
Logical
Under which of the following categories do headphones fall?
A
Output DeviceB
Calculator DeviceC
Input DeviceD
Storage DeviceQuestion 48
Logical
Which substance is the primary component of the reddish-brown coating formed on iron articles exposed to moist air?
A
Iron Sulfate $(FeSO_4)$B
Iron (II) Oxide (FeO)C
Iron (III) Hydroxide $(Fe(OH)_3)$D
Hydrated Iron (III) Oxide $(Fe_2O_3·xH_2O)$Question 49
Logical
Seven people B, C, D, O, P, Q and R are sitting around a circular table facing the center of the table. P sits third to the left of Q. Only one person sits between Q and B when counted from the right of Q. Only two people sit between O and C when counted from the left of O. D is an immediate neighbor of O. Who sits third to the right of R?
A
DB
PC
CD
OQuestion 50
Logical
Which law of Mendel explains the separation of alleles during gamete formation?
A
Law of DominanceB
Law of AssortmentC
Law of SegregationD
Law of VariationQuestion 51
Logical
In an election between two candidates, 84% of the registered voters cast their votes and 20% of the votes polled were found invalid. Winning candidate got 58% of the valid votes and won the election by a margin of 336 votes. How many voters were registered?
A
3125B
3123C
3120D
3124Question 52
Logical
Who was exiled to Rangoon after the First War of Independence in India?
A
Ahmadullah ShahB
Nana SahibC
Bahadur Shah ZafarD
Rani LakshmibaiQuestion 53
Logical
The product of two numbers, X and Y, is 6760, and the HCF of X and Y is 13. Find the number of possible pairs (X,Y), given that X>Y.
A
1B
2C
4D
3Question 54
Logical
Manan starts from Point A and drives 42 km towards South. He then takes a left turn, drives 40 km, turns left and drives 54 km. He then takes a left turn and drives 48 km. He takes a final left turn, drives 12 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again? (All turns are 90-degree turns only, unless specified.)
A
8 km to the eastB
7 km to the eastC
6 km to the westD
5 km to the westQuestion 55
Logical
What should come in place of ‘?’ in the given series? 19 20 28 55 119 ?
A
144B
142C
244D
245Question 56
Logical
TN 13 is related to WR 16 in a certain way. In the same way, KE 18 is related to NI 21. To which of the following is VP 26 related, following the same logic?
A
XU 28B
YV 29C
YT 29D
XY 28Question 57
Logical
Seven boxes A, B, C, D, E, F and G are kept one over the other but not necessarily in the same order. Only two boxes are kept below A. Only two boxes are kept between E and A. F is kept immediately above B. D is kept above G but below A. How many boxes are kept below C but above B?
A
FiveB
ThreeC
TwoD
FourQuestion 58
GK
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? PMO 51 SPR 46 VSU 41 YVX 36 ?
A
BZZ 31B
BJS 30C
BXZ 30D
BYA 31Question 59
GK
₹7770 is divided among A, B, C, and D in such a way that the shares of A and B, B and C, and C and D are in the ratios of 2 : 3, 4 : 5, and 6 : 7, respectively. The share of A (in ₹) is:
A
1224B
1184C
1154D
1124Question 60
GK
Which three countries formed the ACITI Partnership announced in November 2025?
A
India, UK, AustraliaB
Australia, Japan, CanadaC
India, Australia, CanadaD
Canada, USA, IndiaQuestion 61
GK
With reference to the 93rd anniversary celebrations of the Indian Air Force (IAF) in 2025, where was the main ceremonial parade held?
A
GuwahatiB
Bengaluru (HAL Complex)C
Air Force Station Hindan, GhaziabadD
Delhi CantonmentQuestion 62
GK
Which of the following is an example of Customized Software?
A
LibreOffice CalcB
Mozilla Firefox ApplicationC
Adobe Photoshop SoftwareD
School Management SoftwareQuestion 63
GK
According to early Buddhist literature, how many gāmas (villages) were said to exist in the kingdom of Magadha during the reign of King Bimbisāra?
A
1,00,000B
60,000C
80,000D
40,000Question 64
GK
How do Centre-State financial relations impact the governance in India?
A
By eliminating the need for state budgetsB
By centralizing all tax revenues at the CentreC
By providing states with unlimited financial resourcesD
Through mechanisms like the Finance Commission that allocate resourcesQuestion 65
GK
Which constitutional amendment to the Indian Constitution added the term 'Socialist' to the Preamble?
A
42nd Amendment, 1976B
1st Amendment, 1951C
44th Amendment, 1978D
26th Amendment, 1971Question 66
GK
Which of the following principle was most emphasized by Bal Gangadhar Tilak during the Extremist Phase?
A
Support for communal representationB
Swaraj as the birthright of every IndianC
Exclusive focus on economic reformsD
Complete armed revolution against the BritishQuestion 67
GK
Barren Island, which witnessed two eruptions in 2025, is situated in which Union Territory of India?
A
LakshadweepB
PuducherryC
Andaman & Nicobar IslandsD
Dadra & Nagar Haveli and Daman & DiuQuestion 68
GK
This question is based on the five, three-digit numbers given below. (Left) 194 582 419 149 825 (Right) (Example- 697 – First digit = 6, second digit = 9 and third digit = 7) What will be the resultant if the third digit of the highest number is added to the second digit of the lowest number?
A
9B
8C
6D
12Question 69
GK
A and B start running on a circular track of length 900 m. A runs at 225 m/min and B at 180 m/min. Every time A overtakes B, both reduce their speeds by 5% of their then speeds before continuing. After how many minutes (correct to two decimal places) does A overtake B for the 3rd time?
A
62.11 minB
64.41 minC
64.21 minD
63.21 minQuestion 70
GK
Which of the following States/Union Territories shares a border with Afghanistan?
A
LadakhB
RajasthanC
Jammu and KashmirD
PunjabQuestion 71
GK
Why did the share of workers in the rural agriculture sector increase during July–September 2025?
A
Due to urban migrationB
Due to Kharif agricultural operationsC
Because of new government schemesD
Because of a decline in manufacturing jobsQuestion 72
GK
What is the average of all the natural numbers from 1 to 63?
A
31.5B
32.5C
32D
33Question 73
GK
As of February 1, 2025, what percentage of rural households in India had been provided tap water connections under the Jal Jeevan Mission?
A
69.34%B
79.74%C
84.15%D
92.67%Question 74
GK
Which of the following statements is true about the role of Cabinet Ministers in India?
A
They head important ministries like Home, Defence, and Finance.B
They only assist other ministers in their duties.C
They do not attend Cabinet meetings.D
They are not involved in policy decisions.Question 75
GK
If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 4813576, what will be the difference between the highest and the lowest digits in the number thus formed?
A
7B
8C
5D
6Question 76
GK
Seven boxes A, C, G, H, J, N and R are kept one over the other but not necessarily in the same order. Only three boxes are kept below N. Only two boxes are kept between N and J. Only G is kept immediately above H. C is kept at some place below R and at some place above A. How many boxes are kept above C?
A
3B
2C
4D
1Question 77
GK
As per Article ___________ of the Indian Constitution, from the date of commencement of the Constitution (Sixty-ninth Amendment) Act, 1991, the Union territory of Delhi shall be called the National Capital Territory of Delhi.
A
239ACB
239ADC
239ABD
239AAQuestion 78
GK
Which of the following factors causes Ooty to have cooler summers than Coimbatore, even though both are located at nearly the same latitude?
A
Ooty is influenced by cold desert winds from the northB
Coimbatore receives less solar radiation during the yearC
Ooty is located closer to the sea, while Coimbatore is inlandD
Ooty is situated at a higher altitude, leading to lower temperaturesQuestion 79
GK
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? EGE 85 DFD 90 CEC 95 BDB 100 ?
A
ABZ 104B
ABD 104C
ADZ 105D
ACA 105Question 80
GK
The population of a village was 2,90,000. It increased by 10% in the first year and increased by 20% in the second year. Its population after two years is _______.
A
3,19,000B
3,48,000C
3,82,800D
3,77,000Question 81
GK
During recession, which type of Fiscal Policy should be used?
A
Stable Fiscal PolicyB
Expansionary Fiscal PolicyC
Contractionary Fiscal PolicyD
Neutral Fiscal PolicyQuestion 82
GK
Which U.S. state experiences a Mediterranean climate that supports the cultivation of fruits, vegetables, and vineyards?
A
CaliforniaB
FloridaC
TexasD
AlaskaQuestion 83
GK
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: All oranges are apples. No apple is a banana. No banana is a kiwi. Conclusions: (I) No orange is a banana. (II) No apple is a kiwi.
A
Both conclusions (I) and (II) followB
Neither conclusion (I) nor (II) followsC
Only conclusion (I) followsD
Only conclusion (II) followsQuestion 84
GK
In the given figure, if $u \parallel v$, $t_1 \parallel t_2$ and $\angle A = 92^\circ$, find $\angle D$.
A
$88^\circ$B
$82^\circ$C
$78^\circ$D
$92^\circ$Question 85
GK
A shopkeeper professes to sell his goods at a 25% loss but uses a false balance and gains 70%. The actual weight (rounded off to one decimal place) that he uses instead of 1 kg is:
A
443.3 gmB
441.2 gmC
438.1 gmD
436.4 gmQuestion 86
GK
Who is the author of the historical work 'Rajatarangini', which records the history of Kashmir?
A
BanaB
BilhanaC
KalhanaD
KalidasaQuestion 87
GK
Below are given two sets of numbers. In each set of numbers, a certain mathematical operation on the first number results in the second number. Similarly, a certain mathematical operation on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the question? (NOTE – A two/three-digit number cannot be broken into individual digits for operations. E.g. if 37 is followed by 10, the operation cannot be 3+7 as a two-digit number cannot be broken into individual digits.) 15 – 225 – 235 – 195 9 – 81 – 91 – 51
A
10 – 100 – 110 – 90B
8 – 64 – 74 – 104C
18 – 324 – 334 – 294D
16 – 256 – 276 – 246Question 88
GK
Two taps can fill a cistern in 4 hours and 27 hours respectively. A third tap can empty it in 27 hours. How long (in hours) will it take to fill one-fourth of the empty cistern, if all of them are opened together?
A
4B
2C
1D
3Question 89
GK
Free fall corresponds to which type of motion?
A
Non-uniform motionB
Uniform motionC
Uniformly accelerated motionD
Periodic motionQuestion 90
GK
The waves which can propagate in gases are:
A
Transverse WavesB
Gravity WavesC
Longitudinal WavesD
Stationary WavesQuestion 91
GK
The median for the following frequency distribution is: x 1 2 3 4 5 6 7 8 9 f 8 10 11 16 20 25 15 9 6
A
6B
8C
4D
5Question 92
GK
Based on the English alphabetical order, three of the following four letter cluster pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group? (Note: The odd man out is not based on the number of consonants/vowels or their position in the letter cluster)
A
JL-MOB
BD-EHC
NP-QSD
LN-OQQuestion 93
GK
Which of the following regions was one of the major sources for copper for the Harappan civilisation?
A
AfghanistanB
MaharashtraC
RajasthanD
BiharQuestion 94
GK
Based on the English alphabetical order, three of the following four letter cluster pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group? (Note: The odd man out is not based on the number of consonants/vowels or their position in the letter cluster)
A
DF-GJB
PR-SUC
HJ-KMD
MO-PRQuestion 95
GK
A man sold an article for ₹132 by first giving a d% discount on its marked price, and then another discount having the same nominal value (in ₹). If the marked price of the article is ₹880, then what is the value of d?
A
42.5B
46C
39.5D
37.3Question 96
GK
A, B, C, D, E, F and G are sitting around a circular table facing the centre. D sits to the immediate right of A. Only three people sit between D and G when counted from the left of D. Only three people sit between A and F when counted from the right of F. E sits to the immediate right of B. How many people sit between D and E when counted from the right of D?
A
3B
2C
1D
4Question 97
GK
If $a : b : c = 3 : 4 : 5$ and $2a - 3b + 4c = 56$, then the value of $c$ is:
A
20B
22C
21D
24