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: the product of the squares of two positive integers is 9 . how many pairs of positive integers satisfy this condition ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4

Ex Output:
b


Ex Input:
Problem: the length of a rectangular landscape is 3 times its breadth . there is a playground in it whose area is 1600 square mtr & which is 1 / 3 rd of the total landscape . what is the length of the landscape ? 
Options: a ) 90 , b ) 160 , c ) 150 , d ) 120 , e ) 140

Ex Output:
c


Ex Input:
Problem: if the radius of a circle that centers at the origin is 5 , how many j points on the circle have integer coordinates ? 
Options: ['a ) 4', 'b ) 8', 'c ) 12', 'd ) 15', 'e ) 20']

Ex Output:

c