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 train 1500 m long can cross an electric pole in 50 sec and then find the speed of the train ? 
Options: a ) 106 , b ) 107 , c ) 108 , d ) 109 , e ) 110

Ex Output:
c


Ex Input:
Problem: a trader sells 92 meters of cloth for rs . 9890 at the profit of rs . 24 per metre of cloth . what is the cost price of one metre of cloth ? 
Options: a ) 22 , b ) 89.5 , c ) 76.9 , d ) 83.5 , e ) 11

Ex Output:
d


Ex Input:
Problem: a pump can fill a tank with water in 2 hours . because of a leak , it took hours to fill the tank . the leak can drain all the water of the tank in : 
Options: a ) 33 , b ) 37 , c ) 76 , d ) 14 , e ) 29

Ex Output:

d