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: if a and b get profits of rs . 18,000 and rs . 15,000 respectively at the end of year then ratio of their investments are
Options: a ) 6 : 5 , b ) 1 : 4 , c ) 3 : 2 , d ) 2 : 3 , e ) 2 : 5

Ex Output:
a

Ex Input:
Problem: a present value of a machine is $ 900 . its value depletiation rate is 25 % per annum then find the machine value before 2 years ?
Options: a ) $ 1500 , b ) $ 1200 , c ) $ 1600 , d ) $ 1000 , e ) $ 1350

Ex Output:
c

Ex Input:
Problem: a man ' s wages were decreased by 50 % . again , the reduced wages were increased by 50 % . he has a loss of ?
Options: a ) 35 % , b ) 25 % , c ) 20 % , d ) 30 % , e ) none of these

Ex Output:
b