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: if 28 % of a number exceeds 18 % of it by 7.2 , then find the number ? 
Options: a ) 50 , b ) 34 , c ) 55 , d ) 60 , e ) 90
Example Output: e

Example Input: Problem: a and b began business with rs . 3000 and rs . 4000 after 8 months , a withdraws rs . 1000 and b advances rs . 1000 more . at the end of the year , their profits amounted to rs . 630 find the share of a ? 
Options: a ) 240 , b ) 278 , c ) 209 , d ) 267 , e ) 262
Example Output: a

Example Input: Problem: if a ' s income is 25 % less than b ' s . by what % b ' s income is greater than a ? 
Options: a ) 11 , b ) 12 , c ) 33 , d ) 15 , e ) 36
Example Output:
c