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 , b and c invested rs . 6300 , rs . 4200 and rs . 10500 respectively , in a partnership business . find the share of a in profit of rs . 12600 after a year ? 
Options: a ) 3630 , b ) 3637 , c ) 3630 , d ) 3631 , e ) 3780
Example Output: e

Example Input: Problem: the banker ' s gain on a sum due 6 years hence at 12 % per annum is rs . 900 . what is the banker ' s discount ? 
Options: a ) 1240 , b ) 1120 , c ) 1190 , d ) 2150 , e ) none of these
Example Output: d

Example Input: Problem: if 5 % more is gained by selling an article for rs . 220 than by selling it for rs . 160 , the cost of the article is ? 
Options: a ) 127 , b ) 1200 , c ) 1600 , d ) 1400 , e ) 1202
Example Output:
b