Q: 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.
Problem: a fill pipe can fill 1 / 4 of cistern in 16 minutes. in how many minutes, it can fill 3 / 4 of the cistern ?
Options: a. 24 min, b. 30 min, c. 48 min, d. 26 min, e. 16 min
A:
c