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: in an office, totally there are 2800 employees and 25 % of the total employees are males. 30 % of the males in the office are at - least 50 years old. find the number of males aged below 50 years ?
Options: a. 390, b. 490, c. 400, d. 460, e. none of these

A: b
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Q: Problem: the total age of a and b is 16 years more than the total age of b and c. c is how many year younger than
Options: a. 14 years, b. 12 years, c. 56 years, d. 16 years, e. 55 years

A: d
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Q: Problem: the product x of two prime numbers is between 17 and 55. if one of the prime numbers is greater than 2 but less than 6 and the other is greater than 11 but less than 25, then x =
Options: a. 18, b. 29, c. 37, d. 44, e. 65

A:
e
****