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: 11 is subtracted from 40 % of a number and results is 23. what is the number ?
Options: a. 160, b. 92, c. 88, d. 85, e. 34

Output: d


Input: Consider Input: Problem: if 9 / ( 1 + 4 / x ) = 1, then x =
Options: a. 3, b. 1 / 2, c. 1 / 3, d. - 1 / 3, e. - 3

Output: b


Input: Consider Input: Problem: a reduction of 22 % in the price of salt enables a lady to obtain 10 kgs more for rs. 100, find the original price per kg ?
Options: a. s. 2.82, b. s. 2.4, c. s. 2.5, d. s. 2.2, e. s. 2.1


Output: a