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: 150 is what percent of 60 ? 
Options: a ) 250 % , b ) 20 % , c ) 50 % , d ) 200 % , e ) 500 %

Ex Output:
a


Ex Input:
Problem: from the sale of sleeping bags , a retailer made a gross profit of 14 % of the wholesale cost . if each sleeping bag was sold for $ 28 , what was the wholesale cost per bag ? 
Options: a ) 3.0 , b ) 3.36 , c ) 24.56 , d ) 25.0 , e ) 31.36

Ex Output:
c


Ex Input:
Problem: mahesh marks an article 15 % above the cost price of rs . 540 . what must be his discount percentage if he sells it at rs . 496.80 ? 
Options: a ) 22 , b ) 27 , c ) 20 , d ) 21 , e ) 12

Ex Output:

c