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.

Input: Consider Input: Problem: if two dice are thrown together, the probability of getting an even prime number on the dice is
Options: a. 1 / 36, b. 1 / 18, c. 1 / 13, d. 1 / 9, e. 5 / 36

Output: a


Input: Consider Input: Problem: 10 ^ ( 600 ) ã · 10 ^ ( 580 ) = ?
Options: a. 10 ^ 10, b. 10 ^ 20, c. 10 ^ 22, d. 10 ^ 23, e. 10 ^ 24

Output: b


Input: Consider Input: Problem: x can finish a work in 24 days. y can finish the same work in 16 days. yworked for 10 days and left the job. how many days does x alone need to finish the remaining work ?
Options: a. 3, b. 5, c. 6, d. 8, e. 9


Output: e