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: ray writes a two digit number. he sees that the number exceeds 4 times the sum of its digits by 3. if the number is increased by 18, the result is the same as the number formed by reversing the digits. find the number.
Options: a. 2, b. 5, c. 6, d. 7, e. 8
[A]: b


[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: the ratio between the presents of the a and b is 2: 3. if b is 5 years older than a, what will be the ratio of the ages of a and b after 5 years ?
Options: a. 3: 4, b. 1: 2, c. 2: 3, d. 5: 6, e. 1: 3
[A]:
a