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: the calendar of the year 2060 can be used again in the year ? 
Options: a ) 2081 , b ) 2083 , c ) 2088 , d ) 1971 , e ) 1973
Example Output: c

Example Input: Problem: p and q invested in a business . the profit earned was divided in the ratio 4 : 5 . if p invested rs 52000 , the amount invested by q is 
Options: a ) 30000 , b ) 50000 , c ) 40000 , d ) 20000 , e ) 65000
Example Output: e

Example Input: Problem: a person buys an article at rs . 500 . at what price should he sell the article so as to make a profit of 50 % ? 
Options: a ) 750 , b ) 882 , c ) 772 , d ) 652 , e ) 271
Example Output:
a