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: rectangle a has sides a and b , and rectangle b has sides c and d . if a / c = b / d = 3 / 4 , what is the ratio of rectangle a ’ s area to rectangle b ’ s area ? 
Options: a ) 3 / 4 , b ) 9 / 16 , c ) 16 / 3 , d ) 4 / 3 , e ) 3 / 16

Ex Output:
b


Ex Input:
Problem: the diagonals of a rhombus are 13 cm and 20 cm . find its area ? 
Options: a ) 176 , b ) 130 , c ) 150 , d ) 179 , e ) 172

Ex Output:
b


Ex Input:
Problem: what is the diagonal of a square field whose perimeter is 64 m ? 
Options: a ) 15 m , b ) 16 √ 2 m , c ) 20 m , d ) 25 m , e ) 18 m

Ex Output:

b