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 the ratio of the areas of two squares is 225 : 256 , then the ratio of their perimeters is : 
Options: ['a ) 15 : 12', 'b ) 15 : 14', 'c ) 15 : 16', 'd ) 15 : 22', 'e ) none of these']

Ex Output:
c


Ex Input:
Problem: the volume of a certain substance is always directly proportional to its weight . if 48 cubic inches of the substance weigh 112 ounces , what is the volume , in cubic inches , of 56 ounces of this substance ? 
Options: a ) 27 , b ) 36 , c ) 42 , d ) 24 , e ) 147

Ex Output:
d


Ex Input:
Problem: difference between the length and breadth of a rectangle is 23 m . ifits perimeter is 206 m , then its area is ? ? 
Options: ['a ) 1220 m ^ 2', 'b ) 1520 m ^ 2', 'c ) 2520 m ^ 2', 'd ) 2600 m ^ 2', 'e ) 3420 m ^ 2']

Ex Output:

c