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: the sum of three consecutive even numbers is 63 . find the middle number of the three ?
Options: a ) 14 , b ) 23 , c ) 25 , d ) 29 , e ) 21
Example Output: e

Example Input: Problem: if 22 men do a work in 55 days , in how many days will 10 men do it ?
Options: a ) 121 , b ) 123 , c ) 119 , d ) 125 , e ) 127
Example Output: a

Example Input: Problem: express a speed of 63 kmph in meters per second ?
Options: a ) 10 mps , b ) 14 mps , c ) 17.5 mps , d ) 19.4 mps , e ) 10.8 mps
Example Output:
c