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: the price of a t . v . set worth rs . 40000 is to be paid in 20 installments of rs . 1000 each . if the rate of interest be 6 % per annum , and the first installment be paid at the time of purchase , then the value of the last installment covering the interest as well will be ? 
Options: a ) 22678 , b ) 26699 , c ) 26788 , d ) 19000 , e ) 39000

Ex Output:
e


Ex Input:
Problem: what is the value of â ˆ š 25 % ? 
Options: a ) 10 % , b ) 50 % , c ) 25 % , d ) 45 % , e ) 68 %

Ex Output:
b


Ex Input:
Problem: a shirt goes on sale for 70 % of its original price . one week later , the sale price is marked down 10 % . the final price is what percent of the original price ? 
Options: a ) 63 % , b ) 70 % , c ) 62 % , d ) 50 % , e ) 28 %

Ex Output:

a