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: an escalator moves towards the top level at the rate of 7 ft . sec and its length is 180 feet . if a person walks on the moving escalator at the rate of 2 feet per second towards the top level , how much time does he take to cover the entire length . 
Options: a ) 5 sec , b ) 25 sec , c ) 20 sec , d ) 15 sec , e ) 10 sec

Ex Output:
c


Ex Input:
Problem: in the first 25 overs of a cricket game , the run rate was only 5.4 . what should be the run rate in the remaining 25 overs to reach the target of 400 runs ? 
Options: a ) 16.5 , b ) 13.2 , c ) 10.6 , d ) 11.2 , e ) 7.25

Ex Output:
c


Ex Input:
Problem: a person spent rs . 6,040 from his salary on food and 8,000 on house rent . after that he was left with 70 % of his monthly salary . what is his monthly salary ? 
Options: a ) 46,800 , b ) 66,800 , c ) 56,800 , d ) 26,800 , e ) 76,800

Ex Output:

a


