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 length of minute hand of a clock is 5.4 cm . what is the area covered by this in 10 minutes 
Options: a ) 15.27 , b ) 16.27 , c ) 17.27 , d ) 18.27 , e ) 19.27

Ex Output:
a


Ex Input:
Problem: a garrison of 2000 men has provisions for 54 days . at the end of 15 days , a reinforcement arrives , and it is now found that the provisions will last only for 30 days more . what is the reinforcement ? 
Options: a ) 1800 men , b ) 3900 men , c ) 600 men , d ) 3800 men , e ) 900 men

Ex Output:
c


Ex Input:
Problem: the speed of a car is 85 km in the first hour and 45 km in the second hour . what is the average speed of the car ? 
Options: a ) 72 kmph , b ) 65 kmph , c ) 30 kmph , d ) 80 kmph , e ) 82 kmph

Ex Output:

b