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.

[Q]: Problem: ramesh purchased a refrigerator for rs. 12500 after getting a discount of 20 % on the labelled price. he spent rs. 125 on transport and rs. 250 on installation. at what price should it be sold so that the profit earned would be 18 % if no discount was offered ?
Options: a. 17608, b. 17606, c. 17604, d. 17600, e. 18880
[A]: e


[Q]: Problem: the ratio of the volumes of two cubes is 1331: 2197. what is the ratio of their total surface areas ?
Options: a. 121: 169, b. 169: 122, c. 81: 124, d. 81: 126, e. 81: 129
[A]: a


[Q]: Problem: the sides of a square region, measured to the nearest centimeter, are 4 centimeters long. the least possible value of the actual area of the square region is
Options: a. 15.25 sq cm, b. 18.25 sq cm, c. 12.25 sq cm, d. 21.25 sq cm, e. 25.25 sq cm
[A]:
c