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 started a business with an investment of rs . 70000 and after 6 months b joined him investing rs . 120000 . if the profit at the end of a year is rs . 13000 , then the share of b is ?
Options: a ) 6000 , b ) 12000 , c ) 18000 , d ) 24009 , e ) 24002

Ex Output:
a

Ex Input:
Problem: if a large pizza has a radius that is 10 % larger that that of a medium pizza , what is the percent increase in area between a medium and a large pizza ?
Options: a ) 15 % , b ) 21 % , c ) 25 % , d ) 30 % , e ) 36 %

Ex Output:
b

Ex Input:
Problem: john makes $ 60 a week from his job . he earns a raise andnow makes $ 80 a week . what is the % increase ?
Options: a ) 15 % , b ) 33.33 % , c ) 17.8 % , d ) 19 % , e ) 21 %

Ex Output:
b