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 sides of a triangle are 30 cm , 28 cm and 12 cm , what is its area ? 
Options: a ) 120 cm 2 , b ) 112 cm 2 , c ) 776 cm 2 , d ) 666 cm 2 , e ) 168 cm 2

Ex Output:
e


Ex Input:
Problem: the diagonals of two squares are in the ratio of 2 : 5 then find the ratio of its areas ? 
Options: a ) 2 : 12 , b ) 4 : 25 , c ) 5 : 31 , d ) 2 : 19 , e ) 3 : 17

Ex Output:
b


Ex Input:
Problem: two right circular cylinders of equal volumes have their heights in the ratio 1 : 2 . find the ratio of their radii . 
Options: ['a ) √ 3 : 1', 'b ) √ 7 : 1', 'c ) √ 2 : 1', 'd ) 2 : 1', 'e ) 3 : 1']

Ex Output:

c