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.

Example Input: Question: Find the value of y from (12)^3 x 6^4 ÷ 432 = y?

 Option A: 3451

 Option B: 3467

 Option C: 3891

 Option D: 4601

 Option E: 5184
Example Output: Option E

Example 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
Example Output: Option B

Example Input: Question: A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 6 km/hr, find the time taken by the boat to go 86 km downstream.

 Option A: 4.1 hr

 Option B: 5.25 hr

 Option C: 8.25 hr

 Option D: 2.25 hr

 Option E: 2.50 hr
Example Output:
Option A