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: bill made a profit of 10 % by selling a product. if he had purchased that product for 10 % less and sold it at a profit of 30 %, he would have received $ 63 more. what was his original selling price ?
Options: a. $ 850, b. $ 990, c. $ 1050, d. $ 1180, e. $ 1340

Output: b


Input: Consider Input: Problem: a sum of money at simple interest amounts to rs. 720 after 2 years and to rs. 1020 after a further period of 5 years. the sum is :
Options: a. 400, b. 500, c. 600, d. 700, e. 800

Output: c


Input: Consider Input: Problem: a rectangular field is to be fenced on three sides leaving a side of 34 feet uncovered. if the area of the field is 680 sq. ft, how many feet of fencing will be required ?
Options: a. 74 ft, b. 88 ft, c. 22 ft, d. 11 ft, e. 66 ft


Output: a