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.

Ex Input:
Problem: if ( x - 10 ) ( y - 5 ) ( z - 2 ) = 1000 then what is the least value of x + y + z ? if x, y, z are all integer no.
Options: a. 7, b. 8, c. 9, d. 10, e. 11

Ex Output:
a


Ex Input:
Problem: the l. c. m of two numbers is 495 and their h. c. f is 5. if the sum of the numbers is 100, then their difference is
Options: a. 19, b. 10, c. 28, d. 27, e. 29

Ex Output:
b


Ex Input:
Problem: the total of 336 of 20 paise and 25 paise make a sum of rs. 71. the no of 20 paise coins is
Options: a. 238, b. 277, c. 278, d. 260, e. 288

Ex Output:

d