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 40 % of a number is greater than 80 % of 5 by 2 , what is the number ? 
Options: a ) 3 , b ) 15 , c ) 20 , d ) 2 , e ) 5
Example Output: b

Example Input: Problem: if 15 % of 40 is greater than 25 % of a number by 2 , the number is 
Options: a ) 14 , b ) 16 , c ) 18 , d ) 20 , e ) 22
Example Output: b

Example Input: Problem: the sale price sarees listed for rs . 500 after successive discount is 10 % and 5 % is ? 
Options: a ) 427.5 , b ) 277 , c ) 342 , d ) 882 , e ) 212
Example Output:
a