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: uncle bruce is baking chocolate chip cookies . he has 50 ounces of dough ( with no chocolate ) and 40 ounces of chocolate . how much chocolate is left over if he uses all the dough but only wants the cookies to consist of 30 % chocolate ? 
Options: a ) 22.86 , b ) 23.86 , c ) 25 , d ) 26 , e ) 27

Ex Output:
a


Ex Input:
Problem: an inspector rejects 15 % of the meters as defective . how many will he examine to reject 10 ? 
Options: a ) a ) 100 , b ) b ) 66.7 , c ) c ) 250 , d ) d ) 200 , e ) e ) 160

Ex Output:
b


Ex Input:
Problem: find the number of shares that can be bought for rs . 8200 if the market value is rs . 20 each with brokerage being 2.5 % . 
Options: a ) 237 , b ) 270 , c ) 177 , d ) 166 , e ) 111

Ex Output:

c