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: A man took a loan at rate of 12% per annum simple interest. After 3 years he had to pay 4320 interest. The principal amount borrowed by him was.

 Option A: Rs 14000

 Option B: Rs 15000

 Option C: Rs 12000

 Option D: Rs 17000

 Option E: None of these
Example Output: Option C

Example 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
Example Output: Option C

Example Input: Question: If each day a tree loses half its remaining leaves, what fraction of its leaves will it have lost after 6 days ?

 Option A: X-1/8

 Option B: X-1/16

 Option C: X-1/64

 Option D: X/32

 Option E: X/96
Example Output:
Option C