Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Example Input: Problem: there are 7 pairs of socks and 2 socks are worn from that such that the pair of socks worn are not of the same pair. what is the number of pair that can be formed.
Options: a. 40, b. 49, c. 41, d. 56, e. 42
Example Output: e

Example Input: Problem: find large number from below question the difference of two numbers is 1000. on dividing the larger number by the smaller, we get 10 as quotient and the 10 as remainder
Options: a. 1234, b. 1110, c. 1456, d. 1200, e. 1600
Example Output: b

Example Input: Problem: the length of a rectangle is 3 times its width. if the width of the rectangle is 4 inches, what is the rectangle ' s area, in square inches ?
Options: a. 30 square inches, b. 75 square inches, c. 68 square inches, d. 48 square inches, e. 92 square inches
Example Output:
d