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: the sum of all the integers a such that - 26 < a < 24 is
Options: a. 0, b. - 2, c. - 25, d. - 49, e. - 51
[A]: d


[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
[A]: e


[Q]: Problem: if x: y is 1: 5 and y: z is 5: 7 then x: z is equal to
Options: a. 1: 6, b. 1: 5, c. 1: 4, d. 1: 7, e. 1: 3
[A]:
d