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: If x is positive and y is negative, which of the following must be true?

Option A: The product of x and y is positive

Option B: The sum of x and y is positive

Option C: The sum of x and y is negative

Option D: The difference of x and y is positive

Option E: The sum of x^2 and y^2 is positive
Example Output: Option E

Example Input: Question: If the ratio of boys to girls in a class is B and the ratio of girls to boys is G; then 5 (B + G) is ?

Option A: Equal to 3

Option B: Less than 5

Option C: More than 5

Option D: Less than 1/5

Option E: none of these
Example Output: Option A

Example Input: Question: By selling an article at Rs.600, a profit of 25% is made. Find its cost price?

Option A: Rs.287

Option B: Rs.429

Option C: Rs.480

Option D: Rs.412

Option E: Rs.482
Example Output:
Option C