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 Q]: Problem: a cricket player whose bowling average was 23.50 runs per wicket, takes 5 wicket for 52 runs in a match. due to this his average decreases by 0.50. what will be the number of wickets taken by him till the last match ?
Options: a. 64, b. 72, c. 131, d. 456, e. 108
[EX A]: c

[EX Q]: Problem: what sum of money will produce rs. 80 as simple interest in 4 years at 3 1 / 2 percent ?
Options: a. 263, b. 571.4, c. 367, d. 368, e. 339
[EX A]: b

[EX Q]: Problem: a contractor undertook to do a piece of work in 18 days. he employed certain number of laboures but 9 of them were absent from the very first day and the rest could finish the work in only 6 days. find the number of men originally employed ?
Options: a. 3.5, b. 4, c. 4.5, d. 4.2, e. 4.3
[EX A]:
c