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 Q]: Problem: there are 7 pairs of socks and 2 socks are worn from that such that the pair of socks worn are not of the same pair. what is the number of pair that can be formed.
Options: a. 40, b. 49, c. 41, d. 56, e. 42
[EX A]: e

[EX Q]: Problem: | - 2 | ( | - 25 | - | 5 | ) = ? ? source: preparation material mba center
Options: a. 40, b. – 60, c. 60, d. 75, e. 100
[EX A]: a

[EX Q]: Problem: a train is 385 meter long is running at a speed of 45 km / hour. in what time will it pass a bridge of 140 meter length
Options: a. 42 seconds, b. 30 seconds, c. 40 seconds, d. 50 seconds, e. none of these
[EX A]:
a