Detailed Instructions: 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.
Problem:Problem: a retailer buys 80 pens at the market price of 36 pens from a wholesaler, if he sells these pens giving a discount of 1 %, what is the profit % ?
Options: a. 110, b. 115, c. 112, d. 118, e. 120
Solution:
e