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 shopkeeper has 100 kg of apples . he sells 50 % of these at 25 % profit and remaining 50 % at 30 % profit . find his % profit on total .
Options: a ) 27.5 % , b ) 25.6 % , c ) 31.5 % , d ) 35.9 % , e ) 29.5 %

Ex Output:
a

Ex Input:
Problem: in an office , 20 percent of the workers have at least 5 years of service , and a total of 16 workers have at least 10 years of service . if 90 percent of the workers have fewer than 10 years of service , how many of the workers have at least 5 but fewer than 10 years of service ?
Options: a ) 32 , b ) 64 , c ) 50 , d ) 144 , e ) 160

Ex Output:
a

Ex Input:
Problem: find the simple interest on rs . 945 for 5 months at 4 paisa per month ?
Options: a ) s . 325 , b ) s . 500 , c ) s . 200 , d ) s . 189 , e ) s . 211

Ex Output:
d