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: along a yard 414 metres long , 24 trees are palnted at equal distances , one tree being at each end of the yard . what is the distance between two consecutive trees 
Options: a ) 18 , b ) 19 , c ) 10 , d ) 11 , e ) 12

Ex Output:
a


Ex Input:
Problem: a train running at the speed of 60 km / hr crosses a pole in 6 sec . what is the length of the train ? 
Options: a ) 356 , b ) 278 , c ) 127 , d ) 100 , e ) 150

Ex Output:
d


Ex Input:
Problem: a train speeds past a pole in 10 seconds and a platform 100 m long in 30 seconds . its length is ? 
Options: a ) 188 m , b ) 876 m , c ) 251 m , d ) 50 m , e ) 45 m

Ex Output:

d