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: a soccer team played 280 games and won 65 percent of them. how many games did it win ?
Options: a. 182, b. 100, c. 104, d. 150, e. 124
Example Output: a

Example Input: Problem: a sells a bicycle to b and makes a profit of 50 %. b sells the same bicycle to c at a profit of 25 %. if the final s. p. of the bicycle was rs. 225, find out the cost price of the bicycle for a.
Options: a. 237, b. 126, c. 971, d. 611, e. 120
Example Output: e

Example Input: Problem: it is currently 7: 05 pm. what time was it in the morning exactly 51,132 minutes ago ?
Options: a. 6: 53, b. 6: 55, c. 6: 59, d. 7: 03, e. 7: 09
Example Output:
a