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: if the wheel is 14 cm then the number of revolutions to cover a distance of 3520 cm is ? 
Options: a ) 22 , b ) 28 , c ) 17 , d ) 12 , e ) 40
Example Output: e

Example Input: Problem: a , b and c completed a piece of work , a worked for 6 days , b for 9 days and c for 4 days . their daily wages were in the ratio of 3 : 4 : 5 . find the daily wages of c , if their total earning was rs . 1702 ? 
Options: a ) s . 109 , b ) s . 115 , c ) s . 100 , d ) s . 103 , e ) s . 102
Example Output: b

Example Input: Problem: a , b , c can complete a piece of work in 21 , 6,12 days . working together , they complete the same work in how many days ? 
Options: a ) 2 , b ) 4 / 5 , c ) 7 / 9 , d ) 10 , e ) 84 / 25
Example Output:
e