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: the ratio between the length and the breadth of a rectangular park is 3 : 2 . if a man cycling along the boundary of the park at the speed of 12 km / hr completes one round in 8 minutes , then the area of the park ( in sq . m ) is 
Options: a ) 153200 , b ) 153400 , c ) 153600 , d ) 154000 , e ) 154200

Ex Output:
c


Ex Input:
Problem: an engine moves at the speed of 60 kmph without any coaches attached to it . speed of the train reduces at the rate that varies directly as the square root of the number of coaches attached . when 4 coaches are attached speed decreases to 48 kmph . what will be the speed of train when 36 coaches are attached . 
Options: a ) 24 , b ) 28 , c ) 20 , d ) 32 , e ) 40

Ex Output:
a


Ex Input:
Problem: in a shower , 5 cm of rain falls . the volume of water that falls on 1.5 hectares of ground is : 
Options: ['a ) 75 cu . m', 'b ) 750 cu . m', 'c ) 7500 cu . m', 'd ) 75000 cu . m', 'e ) none of these']

Ex Output:

b