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: the salary of a person was reduced by 14 %. by what percent should his reduced salary be raised so as to bring it at par with his original salary ?
Options: a. 10 %, b. 16.3 %, c. 13.7 %, d. 15.1 %, e. 12.3 %

Output: b


Input: Consider Input: Problem: the purchase price of an article is $ 48. in order to include 5 % of cost for overhead and to provide $ 12 of net profit, the markup should be
Options: a. 15 %, b. 25 %, c. 30 %, d. 40 %, e. 45 %

Output: c


Input: Consider Input: Problem: a boat crossed a lake from north to east at the speed of 7 km / h, entered a river and covered twice as much distance going upstream at 6 km / h. it then turned around and stopped at the south shore of the lake. if it averaged 3.8 km / h that day, what was its approximate downstream speed ?
Options: a. 4, b. 5, c. 6, d. 7, e. 8


Output: e