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 does the hexa number E78 in radix 7.

 Option A: 12455

 Option B: 14153

 Option C: 14256

 Option D: 13541

 Option E: 14541

Ex Output:
Option D


Ex Input:
Question: The number of diagonals of a polygon of n sides is given by the formula z=n(n-3)/2. If a polygon has twice as many diagonals as sides, how many sides does it have?

 Option A:  3

 Option B:  5

 Option C:  6

 Option D:  7

 Option E:  8

Ex Output:
Option B


Ex Input:
Question: 96 can be expressed as a product of primes as

 Option A: 2 × 2 × 3 × 3 × 3 × 7

 Option B: 2 × 3 × 3 × 3 × 7 × 7

 Option C: 2 × 2 × 2 × 2 × 2 × 3

 Option D: 2 × 3 × 3 × 3 × 3 × 7

 Option E: None of these

Ex Output:

Option C