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: 108 ã — 108 + 92 ã — 92 = ?
Options: a. 20120, b. 11500, c. 20128, d. 20660, e. 20228
[A]: c


[Q]: Problem: j is faster than p. j and p each walk 24 km. sum ofthe speeds of j and p is 7 kmph. sum of time taken by them is 14 hours. then j speed is equal to ?
Options: a. 4, b. 5, c. 6, d. 7, e. 8
[A]: a


[Q]: Problem: the compound ratio of 5: 1, 3: 1 and 2: 5 ?
Options: a. 6: 1, b. 1: 3, c. 1: 5, d. 1: 1, e. 1: 6
[A]:
a