In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: what is the remainder when 14,451 × 15,654 × 16,783 is divided by 5 ? 
Options: a ) 1 , b ) 3 , c ) 2 , d ) 4 , e ) 5
Example Output: c

Example Input: Problem: a & b started a partnership business . a ' s investment was thrice the investment of b and the period of his investment was two times the period of investments of b . if b received rs 4500 as profit , what is their total profit ? 
Options: a ) 28000 , b ) 30000 , c ) 31500 , d ) 34000 , e ) none of these
Example Output: c

Example Input: Problem: a gets 3 times as much money as b gets , b gets only rs . 25 more then what c gets . the 3 gets rs . 645 in all . find the share of b ? 
Options: a ) 134 , b ) 120 , c ) 218 , d ) 140 , e ) 145
Example Output:
a