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: 5, 10, 13, 26, 29, 58, 61, (....)

 Option A: 122

 Option B: 125

 Option C: 128

 Option D: 64

 Option E: 130
Example Output: Option A

Example Input: Question: A sum of Rs. 12500 amounts to Rs. 16000 in 4 years at the rate of simple interest. What is the rate of interest?

 Option A: 7%

 Option B: 5%

 Option C: 6%

 Option D: 8%

 Option E: 14%
Example Output: Option A

Example Input: Question: The R students in a class agree to contribute equally to buy their teacher a birthday present that costs y dollars. If e of the students later fail to contribute their share, which of the following represents the additional number of dollars that each of the remaining students must contribute in order to pay for the present?

 Option A:  y/R

 Option B:  y/(R-x

 Option C:  xy/(R-x

 Option D:  ey/(R(R-e

 Option E:  y/(R(R-x
Example Output:
Option D