Detailed Instructions: 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.
Q: Problem: george went to a fruit market with certain amount of money. with this money he can buy either 40 oranges or 40 mangoes. he retains 10 % of the money for taxi fare and buys 20 mangoes. how many oranges can he buy ?
Options: a. 25, b. 30, c. 20, d. 16, e. 12
A:
a