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: by selling an article at rs . 1000 , a shopkeeper makes a profit of 25 % . at what price should he sell the article so as to make a loss of 25 % ? 
Options: a ) s . 600 , b ) s . 480 , c ) s . 500 , d ) s . 450 , e ) s . 550

Ex Output:
a


Ex Input:
Problem: a and b began business with rs . 3000 and rs . 4000 after 8 months , a withdraws rs . 1000 and b advances rs . 1000 more . at the end of the year , their profits amounted to rs . 630 find the share of a ? 
Options: a ) 240 , b ) 278 , c ) 209 , d ) 267 , e ) 262

Ex Output:
a


Ex Input:
Problem: 20 % of a 6 litre solution and 60 % of 4 litre solution are mixed . what percentage of the mixture of solution 
Options: a ) 36 % , b ) 35 % , c ) 34 % , d ) 33 % , e ) 32 %

Ex Output:

a