You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Ex Input:
Question: The average of first seven prime numbers which are between 30 and 70 is

Option A: 35.4

Option B: 42

Option C: 44.4

Option D: 57

Option E: 67

Ex Output:
Option C

Ex Input:
Question: Which of the following is greatest?

Option A: 1/10

Option B: 1/100

Option C: 1/1000

Option D: 1/10^9

Option E: 1/5

Ex Output:
Option E

Ex Input:
Question: A fair coin is tossed 13 times. What is the probability of getting more heads than tails in 13 tosses?

Option A: 1/2

Option B: 63/128

Option C: 4/7

Option D: 61/256

Option E: 63/64

Ex Output:
Option A