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: ravi and kavi start a business by investing a ' 4000 and a ' 72000 , respectively . find the ratio of their profits at the end of year .
Options: a ) 2 : 28 , b ) 5 : 28 , c ) 7 : 18 , d ) 1 : 18 , e ) 3 : 18

Ex Output:
d

Ex Input:
Problem: a dishonest shopkeeper professes to sell pulses at the cost price , but he uses a false weight of 930 gm . for a kg . his gain is % .
Options: a ) 5.26 % , b ) 5.36 % , c ) 4.26 % , d ) 6.26 % , e ) 7.53 %

Ex Output:
e

Ex Input:
Problem: boy sells a book for rs . 720 he gets a loss of 10 % , to gain 10 % , what should be the sp ?
Options: a ) 430 , b ) 880 , c ) 550 , d ) 590 , e ) 600

Ex Output:
b