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'.

Ex Input:
Problem: a shopkeeper has 280 kg of apples . he sells 45 % of these at 20 % profit and remaining 60 % at 30 % profit . find his % profit on total . 
Options: a ) 24 % , b ) 25 % , c ) 27 % , d ) 28 % , e ) 35 %

Ex Output:
c


Ex Input:
Problem: in a certificate by mistake a candidate gave his height as 25 % more than actual height . in the interview panel , he clarified that his height was 5 feet 5 nches . find the % correction made by the candidate from his stated height to his actual height ? 
Options: a ) 10 , b ) 20 , c ) 30 , d ) 35 , e ) 43

Ex Output:
b


Ex Input:
Problem: the population of a town is 8000 . it decreases annually at the rate of 10 % p . a . what will be its population after 1 years ? 
Options: a ) 5100 , b ) 5120 , c ) 7200 , d ) 5400 , e ) 5500

Ex Output:

c