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'.

Example Input: Problem: convert the 15 / 36 m / s into kilometers per hour ? 
Options: a ) 1.7 , b ) 1.5 , c ) 1.3 , d ) 1.1 , e ) 1.2
Example Output: b

Example Input: Problem: if the wheel is 28 cm then the number of revolutions to cover a distance of 1056 cm is ? 
Options: a ) 3 , b ) 5 , c ) 26 , d ) 12 , e ) 6
Example Output: e

Example Input: Problem: a train 110 m long is running at 50 kmph . in how much time will it pass a platform 210 m long ? 
Options: a ) 14.15 seconds , b ) 15.24 seconds , c ) 16.28 seconds , d ) 13.30 seconds , e ) 10.24 seconds
Example Output:
e