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 invests rs . 3000 and rs . 7000 respectively in a business . if a doubles his capital after 6 months . in what ratio should a and b divide that year ' s profit ? 
Options: a ) 9 : 6 , b ) 9 : 8 , c ) 9 : 14 , d ) 9 : 9 , e ) 9 : 5
Example Output: c

Example Input: Problem: how many liters of water must be evaporated from 50 liters of a 8 - percent sugar solution to get a 10 - percent solution ? 
Options: a ) 8 , b ) 10 , c ) 12 , d ) 14 , e ) 16
Example Output: b

Example Input: Problem: a man buys a cycle for rs . 1600 and sells it at a loss of 12 % . what is the selling price of the cycle ? 
Options: a ) 1410 , b ) 1420 , c ) 1430 , d ) 1408 , e ) 1540
Example Output:
d