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: what percent of a day is 7 hours ?
Options: a ) 29.2 % , b ) 12.5 % , c ) 13 % , d ) 11.3 % , e ) none of these
Example Output: a

Example Input: Problem: the radius of a wheel is 22.6 cm . what is the distance covered by the wheel in making 750 resolutions ?
Options: a ) 754 m , b ) 704 m , c ) 1055.04 m , d ) 1058.04 m , e ) 204 m
Example Output: c

Example Input: Problem: a train covers a distance of 36 km in 12 min . if it takes 7 sec to pass a telegraph post , then the length of the train is ?
Options: a ) 330 , b ) 340 , c ) 350 , d ) 360 , e ) 370
Example Output:
c