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: if 3 men or 4 women can do a piece of work in 16 days , in how many days can 12 men and 8 women do the same piece of work ? 
Options: a ) 8 / 3 , b ) 6 , c ) 5 , d ) 4 , e ) 3

Ex Output:
a


Ex Input:
Problem: a train passes a station platform in 31 sec and a man standing on the platform in 20 sec . if the speed of the train is 54 km / hr . what is the length of the platform ? 
Options: a ) 228 , b ) 240 , c ) 165 , d ) 166 , e ) 1811

Ex Output:
c


Ex Input:
Problem: the length of a rectangular plot is 20 metres more than its breadth . if the cost of fencing the plot @ rs . 26.50 per metre is rs . 7420 , what is the length of the plot in metres ? 
Options: a ) 20 , b ) 200 , c ) 300 , d ) 400 , e ) 80

Ex Output:

e