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: find the annual income derived by investing $ 6800 in 30 % stock at 136 . 
Options: a ) 550 , b ) 1500 , c ) 250 , d ) 1300 , e ) 400

Ex Output:
b


Ex Input:
Problem: a number exceeds 20 % of itself by 40 . the number is ? 
Options: a ) 50 , b ) 60 , c ) 80 , d ) 320 , e ) none

Ex Output:
a


Ex Input:
Problem: a watch was sold at a loss of 5 % . if it was sold for rs . 500 more , there would have been a gain of 5 % . what is the cost price ? 
Options: a ) 1000 , b ) 2998 , c ) 2778 , d ) 2788 , e ) 2991

Ex Output:

d