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: a shopkeeper sells 500 metres of cloth for rs. 18000 at a loss of rs. 5 per metre. find his cost price for one metre of cloth ?
Options: a. 12, b. 27, c. 29, d. 50, e. 41

Output: e


Input: Consider Input: Problem: a can do a piece of work in 4 hours; b and c together can do it in 3 hours, while a and c together can do it 2 hours. how long will b alone take to do it ?
Options: a. 8 hours, b. 10 hours, c. 12 hours, d. 24 hours, e. none of these

Output: c


Input: Consider Input: Problem: a straight line in the xy - plane has a slope of 2 and a y - intercept of 2. on this line, what is the x - coordinate of the point whose y - coordinate is 540 ?
Options: a. 249, b. 498, c. 676, d. 269, e. 1,002


Output: d