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 speed of a train is 120 kmph . what is the distance covered by it in 40 minutes ? 
Options: a ) 50 kmph , b ) 60 kmph , c ) 70 kmph , d ) 80 kmph , e ) 85 kmph

Ex Output:
d


Ex Input:
Problem: a girl goes to her school from her house at a speed of 6 km / hr and returns at a speed of 4 km / hr . if she takes 10 hours in going and coming back , the distance between her school and house is 
Options: a ) 12 kms , b ) 16 kms , c ) 20 kms , d ) 24 kms , e ) none of above

Ex Output:
d


Ex Input:
Problem: a cube of side 5.5 meter length is cut into small cubes of side 110 cm each . how many such small cubes can be obtained ? 
Options: a ) 125 , b ) 127 , c ) 152 , d ) 140 , e ) 190

Ex Output:

a