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.

Ex Input:
Problem: if ( 1 – 1.25 ) n = 4, then n =
Options: a. − 400, b. − 16, c. − 4, d. 4, e. 400

Ex Output:
b


Ex Input:
Problem: in a factory, an average of 60 tv ' s are produced per day for the fist 25 days of the months. a few workers fell ill for the next 5 days reducing the daily avg for the month to 58 sets / day. the average production per day for day last 5 days is ?
Options: a. 20, b. 36, c. 48, d. 50, e. 59

Ex Output:
c


Ex Input:
Problem: in the first 20 overs of a cricket game, the run rate was only 4.8. what should be the run rate in the remaining 30 overs to reach the target of 302 runs ?
Options: a. 5, b. 6.25, c. 6.75, d. 6.87, e. 7.25

Ex Output:

d