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: how many seconds will a train 250 meters long take to cross a platform 200 meters long if the speed of the train is 90 kmph ? 
Options: a ) 18 sec , b ) 15 sec , c ) 21 sec , d ) 16 sec , e ) 20 sec

Ex Output:
a


Ex Input:
Problem: mahesh can do a piece of work in 35 days . he works at it for 20 days and then rajesh finished it in 30 days . how long will y take to complete the work ? 
Options: a ) 45 , b ) 25 , c ) 37 , d ) 41 , e ) 70

Ex Output:
e


Ex Input:
Problem: the area of a sector of a circle of radius 5 cm formed by an arc of length 3.5 cm is ? 
Options: ['a ) 0.35 cm 2', 'b ) 17.5 cm 2', 'c ) 8.75 cm 2', 'd ) 55 cm 2', 'e ) 50 cm 2']

Ex Output:

c