TASK DEFINITION: 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: Problem: it is only in the second option we find the sentence a in continuation with the opening sentence d. sentence a alone explains, why the fear has such enormous effect on the human beings.
Options: a. 28, b. 99, c. 728, d. 27, e. 271

SOLUTION: b

PROBLEM: Problem: a student travels from his house to school at 12 km / hr and reaches school 2 hours late. the next day he travels 20 km / hr and reaches school 1 hour early. what is the distance between his house and the school ?
Options: a. 90, b. 100, c. 110, d. 120, e. 130

SOLUTION: a

PROBLEM: Problem: by selling 11 pencils for a rupee a man loses 10 %. how many for a rupee should he sell in order to gain 20 % ?
Options: a. 8.25, b. 9.25, c. 7.25, d. 10.25, e. 3.25

SOLUTION:
a