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.

Input: Consider Input: Problem: if a / b = 4 / 3, then ( 3 a + 2 b. / ( 3 a - 2 b. = ?
Options: a. 6, b. 3, c. 5, d. - 1, e. none

Output: b

Input: Consider Input: Problem: 18.05 a 0.001 = ?
Options: a. 0.1805, b. 0.01805, c. 1.805, d. 0.001805, e. none of these

Output: b

Input: Consider Input: Problem: what is the value of n if the sum of the consecutive odd intergers w from 1 to n equals 169 ?
Options: a. 47, b. 25, c. 37, d. 33, e. 29
Output: b