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 merchant purchased a jacket for $ 60 and then determined a selling price that equalled the purchase price of the jacket plus a markup that was 25 percent of the selling price . during a sale , the merchant discounted the selling price by 20 percent and sold the jacket . what was the merchant ' s gross profit on this sale ?
Options: a ) $ 0 , b ) $ 3 , c ) $ 4 , d ) $ 12 , e ) $ 15

Ex Output:
c

Ex Input:
Problem: a person buys an article at rs . 400 . at what price should he sell the article so as to make a profit of 40 % ?
Options: a ) 600 , b ) 277 , c ) 560 , d ) 261 , e ) 281

Ex Output:
c

Ex Input:
Problem: a man can row his boat with the stream at 22 km / h and against the stream in 10 km / h . the man ' s rate is ?
Options: a ) 1 kmph , b ) 6 kmph , c ) 7 kmph , d ) 4 kmph , e ) 9 kmph

Ex Output:
b