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'.

Example Input: Problem: a and b started a business in partnership investing rs . 20,000 and rs . 15,000 respectively . after 6 months , c joined them with rs . 20,000 . whatwill be b ' s share in total profit of rs . 25,000 earned at the end of 2 years from the startingof the business ?
Options: a ) rs . 5,000 , b ) rs . 5,500 , c ) rs . 5,700 , d ) rs . 6,500 , e ) rs . 7,500
Example Output: e

Example Input: Problem: how many liters of water must be evaporated from 50 liters of a 2 - percent sugar solution to get a 10 - percent solution ?
Options: a ) 25 , b ) 30 , c ) 35 , d ) 40 , e ) 45
Example Output: d

Example Input: Problem: find the simple interest on rs . 68,000 at 16 2 / 3 % per annum for 9 months .
Options: a ) rs . 8500 , b ) rs . 8000 , c ) rs . 7500 , d ) rs . 7000 , e ) rs . 6500
Example Output:
a