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 reduction of 50 % in the price of apples would enable a man to obtain 50 more for rs . 50 , what is reduced price per dozen ? 
Options: a ) 1 , b ) 3 , c ) 6 , d ) 7 , e ) 10

Ex Output:
c


Ex Input:
Problem: what is 50 % of 40 % of 1200 grams ? 
Options: a ) 450 gms , b ) 100 gms , c ) 300 gms , d ) 240 gms , e ) none of these

Ex Output:
d


Ex Input:
Problem: $ 500 will become $ 1000 in 5 years find the rate of interest ? 
Options: a ) 10 % , b ) 20 % , c ) 25 % , d ) 30 % , e ) 50 %

Ex Output:

b