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: if 40 % of a certain number is 160 , then what is 30 % of that number ? 
Options: a ) 270 , b ) 380 , c ) 120 , d ) 360 , e ) 180

Ex Output:
c


Ex Input:
Problem: if each edge of cube increased by 30 % , the percentage increase in 
Options: a ) 69 , b ) 72 , c ) 64 , d ) 61 , e ) 75

Ex Output:
a


Ex Input:
Problem: a cycle is bought for rs . 840 and sold for rs . 1220 , find the gain percent ? 
Options: a ) 70 % , b ) 45 % , c ) 48 % , d ) 30 % , e ) 40 %

Ex Output:

b