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 shopkeeper sells 500 metres of cloth for rs . 18000 at a loss of rs . 5 per metre . find his cost price for one metre of cloth ? 
Options: a ) 12 , b ) 27 , c ) 29 , d ) 50 , e ) 41

Ex Output:
e


Ex Input:
Problem: what will be the difference between simple and compound interest at 16 % per annum on a sum of rs . 1000 after 4 years ? 
Options: a ) 164.19 , b ) 164.12 , c ) 170.6 , d ) 167.1 , e ) 165.11

Ex Output:
c


Ex Input:
Problem: milk contains 5 % water . what content of pure milk should be added to 10 liters of milk to reduce this to 2 % ? 
Options: a ) 10 liters , b ) 15 liters , c ) 20 liters , d ) 18 liters , e ) 22 liters

Ex Output:

b