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.
--------
Question: Problem: a cricket player whose bowling average was 21.5 runs per wicket, takes 5 wicket for 52 runs in a match. due to this his average decreases by 0.5. what will be the number of wickets taken by him till the last match ?
Options: a. 64, b. 72, c. 111, d. 721, e. 108

Answer: c

Question: Problem: if x ^ 2 3 x = 18, then one possible value of x 4 =
Options: a. - 9, b. - 5, c. - 3, d. - 1, e. 2

Answer: e

Question: Problem: a person spends 40 % of his salary on food, 25 % on house rent, 15 % on entertainment and 5 % on conveyance. if his savings at the end of the month is rs. 1200, then his salary per month in rupees is :
Options: a. 4000, b. 6000, c. 8000, d. 10000, e. none of these

Answer:
c