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: What is the units digit of 18! + 5 ?

 Option A: 2

 Option B: 3

 Option C: 4

 Option D: 5

 Option E: 6

Ex Output:
Option D


Ex Input:
Question: The average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

 Option A: 19 years

 Option B: 17 years

 Option C: 25 years

 Option D: 15 years

 Option E: 12 years

Ex Output:
Option A


Ex Input:
Question: The product of two negative integers, a and b, is a prime number p. If p is the number of factors of n, where n is NOT a perfect square, what is the value of the median of the four integers a, b, p, and n?

 Option A: 0

 Option B: 1/2

 Option C: 1

 Option D: 3/2

 Option E: 2

Ex Output:

Option B