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 Input:
Problem: a train 100 meters long completely crosses a 300 meters long bridge in 36 seconds. what is the speed of the train is ?
Options: a. 32 kmph, b. 76 kmph, c. 34 kmph, d. 43 kmph, e. 40 kmph

Ex Output:
e


Ex Input:
Problem: on the number line, the number p is twice as many units from - 2 as - 2 is from 5. if p is less than – 2, what is the value of p ?
Options: a. – 16, b. – 10, c. – 6, d. 10, e. 14

Ex Output:
a


Ex Input:
Problem: the average of numbers 0.64205, 0.64203, 0.64202 and 0.64201 is ?
Options: a. 0.64202, b. 0.64204, c. 0.642022, d. 0.642028, e. none

Ex Output:

d