In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: there were two candidates in an election . winner candidate received 62 % of votes and won the election by 324 votes . find the number of votes casted to the winning candidate ?
Options: a ) 456 , b ) 837 , c ) 912 , d ) 1200 , e ) 1400
Example Output: b

Example Input: Problem: find the simple interest on rs . 520 for 7 months at 8 paisa per month ?
Options: a ) 277 , b ) 270 , c ) 291 , d ) 266 , e ) 121
Example Output: c

Example Input: Problem: what is the value of 16 % ?
Options: a ) 20 % , b ) 30 % , c ) 40 % , d ) 50 % , e ) 60 %
Example Output:
c