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 horse chases a pony 8 hours after the pony runs . horse takes 12 hours to reach the pony . if the average speed of the horse is 320 kmph , what s the average speed of the pony ? 
Options: a ) 182 kmph , b ) 192 kmph , c ) 193 kmph , d ) 196 kmph , e ) 190 kmph

Ex Output:
b


Ex Input:
Problem: in a kilometer race , a beats b by 40 meters or 10 seconds . what time does a take to complete the race ? 
Options: a ) 290 sec , b ) 190 sec , c ) 199 sec , d ) 192 sec , e ) 240 sec

Ex Output:
e


Ex Input:
Problem: man 1 does a work in 10 days and man 2 does the same work in 15 days . in how many days they together will do the same work ? 
Options: a ) 10 days , b ) 5 days , c ) 6 days , d ) 7 days , e ) 8 days

Ex Output:

c