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 180 meter long train crosses a man standing on the platform in 9 sec . what is the speed of the train ? 
Options: a ) 72 , b ) 108 , c ) 1266 , d ) 188 , e ) 211

Output: a


Input: Consider Input: Problem: the length of the longest tape in cm which can be used to measure exactly , the length 7 m ; 3 m 85 cm ; and 12 m 95 cm is : 
Options: a ) 37 , b ) 35 , c ) 34 , d ) 36 , e ) 38

Output: b


Input: Consider Input: Problem: a man rows his boat 80 km downstream and 38 km upstream , taking 3 hours each time . find the speed of the stream ? 
Options: a ) 6 , b ) 9 , c ) 7 , d ) 8 , e ) 2


Output: b