In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: a tank can supply water to a village for 60 days . if a leak at the bottom of the tank drains out 10 liters per day , the supply lasts for 45 days only . for how many days will the supply last if the leak drains out 20 liters per day ? 
Options: a ) 15 , b ) 18 , c ) 20 , d ) 24 , e ) 36

Ex Output:
e


Ex Input:
Problem: the radius of a wheel is 22.6 cm . what is the distance covered by the wheel in making 750 resolutions ? 
Options: a ) 754 m , b ) 704 m , c ) 1055.04 m , d ) 1058.04 m , e ) 204 m

Ex Output:
c


Ex Input:
Problem: a train 360 m long is running at a speed of 42 km / hr . in what time will it pass a bridge 140 m long ? 
Options: a ) 40 sec , b ) 29 sec , c ) 26 sec , d ) 27 sec , e ) 43 sec

Ex Output:

e