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

Ex Input:
Problem: in measuring the sides of a rectangle , one side is taken 10 % in excess and other 5 % in deficit . find the error percentage in the area calculated from these measurements . 
Options: a ) 3.5 % , b ) 2.4 % , c ) 3 % , d ) 4.5 % , e ) 2.6 %

Ex Output:
d


Ex Input:
Problem: if n is the smallest integer such that 144 times n is the square of an integer , what is the value of n ? 
Options: a ) 2 , b ) 3 , c ) 6 , d ) 12 , e ) 24

Ex Output:
a


Ex Input:
Problem: you buy a piece of land with an area of â ˆ š 1024 , how long is one side of the land plot ? 
Options: a ) 28 , b ) 29 , c ) 30 , d ) 31 , e ) 32

Ex Output:

e