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: The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream?

 Option A: 12

 Option B: 15

 Option C: 14

 Option D: 18

 Option E: 19

Ex Output:
Option C


Ex Input:
Question: P is three times as fast as Q and working together, they can complete a work in 12 days. In how many days can Q alone complete the work?

 Option A: 11 days

 Option B: 16 days

 Option C: 13 days

 Option D: 15 days

 Option E: 19 days

Ex Output:
Option B


Ex Input:
Question: A man buys an article for Rs. 27.50 and sells it for Rs 28.60. Find his gain percent

 Option A: 4%

 Option B: 2%

 Option C: 1%

 Option D: 3%

 Option E: 5%

Ex Output:

Option A