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: 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: what is the area of square field whose side of length 17 m ? 
Options: a ) 225 , b ) 777 , c ) 266 , d ) 289 , e ) 261

Ex Output:
d


Ex Input:
Problem: a circular garden is surrounded by a fence of negligible width along the boundary . if the length of the fence is 1 / 4 of th area of the garden . what is the radius of the circular garden ? 
Options: a ) 1 , b ) 2 , c ) 4 , d ) 8 , e ) 16

Ex Output:

d