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'.

Input: Consider Input: Problem: a train passes a station platform in 35 sec and a man standing on the platform in 20 sec . if the speed of the train is 54 km / hr . what is the length of the platform ? 
Options: a ) 228 , b ) 240 , c ) 225 , d ) 166 , e ) 1811

Output: c


Input: Consider Input: Problem: the radius of a circular wheel is 1.75 m , how many revolutions will it make in traveling 1 km ? 
Options: ['a ) 1000', 'b ) 2788', 'c ) 2677', 'd ) 2899', 'e ) 2771']

Output: a


Input: Consider Input: Problem: a train 125 m long crosses a platform 125 m long in 14 sec ; find the speed of the train ? 
Options: a ) 87 kmph , b ) 64 kmph , c ) 54 kmph , d ) 16 kmph , e ) 18 kmph


Output: b