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 runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 20 runs. Find his average in all the 30 matches?

 Option A: 31

 Option B: 46

 Option C: 88

 Option D: 33.33

 Option E: 12

Ex Output:
Option D


Ex Input:
Question: If 375*s is a perfect square then s can be which of the following numbers?

 Option A: 21

 Option B: 35

 Option C: 54

 Option D: 15

 Option E: 150

Ex Output:
Option D


Ex Input:
Question: In a group of 4 boys and 6 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be selected?

 Option A: 135

 Option B: 155

 Option C: 175

 Option D: 195

 Option E: 215

Ex Output:

Option D