In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Ex Input:
Problem: a room is 6 meters 24 centimeters in length and 4 meters 32 centimeters in width . find the least number of square tiles of equal size required to cover the entire floor of the room . 
Options: a ) 107 , b ) 117 , c ) 127 , d ) 137 , e ) 147

Ex Output:
b


Ex Input:
Problem: an object thrown directly upward is at a height of h feet after t seconds , where h = - 12 ( t - 3 ) ^ 2 + 120 . at what height , in feet , is the object 2 seconds after it reaches its maximum height ? 
Options: a ) 48 , b ) 54 , c ) 60 , d ) 66 , e ) 72

Ex Output:
e


Ex Input:
Problem: what least number must be subtracted from 427751 so that remaining no . is divisible by 10 
Options: a ) 3 , b ) 1 , c ) 6 , d ) 8 , e ) 9

Ex Output:

b