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: jaclyn buys $ 10 000 worth of debentures in a company . she earns 9.5 % p . a . simple interest , paid to her quarterly ( that is , every 3 months ) . if the agreed period of the debenture was 18 months : calculate the amount of interest jaclyn will earn for each quarter
Options: a ) 237.5 , b ) 234 , c ) 289.5 , d ) 345 , e ) none of these

Ex Output:
a

Ex Input:
Problem: the c . p of 20 books is equal to the s . p of 30 books . find his gain % or loss % ?
Options: a ) 63.33 % , b ) 34.33 % , c ) 33.33 % , d ) 31.33 % , e ) 36.33 %

Ex Output:
c

Ex Input:
Problem: john ' s bank ' s saving amount is decreased 50 % due to loan payment and current balance is rs . 50000 . find the actual balance before deduction ?
Options: a ) 100000 , b ) 8500 , c ) 9000 , d ) 9500 , e ) 10000

Ex Output:
a