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 length of rectangle is thrice its breadth and its perimeter is 64 m , find the area of the rectangle ? 
Options: a ) 432 sq m , b ) 192 sq m , c ) 452 sq m , d ) 428 sq m , e ) 528 sq m

Ex Output:
b


Ex Input:
Problem: if the sum of a number and its square is 72 , what is the number ? 
Options: a ) 15 , b ) 26 , c ) 8 , d ) 91 , e ) none of these

Ex Output:
c


Ex Input:
Problem: a girl walking at the rate of 9 km per hour crosses a square field diagonally in 12 seconds . the area of the field is : 
Options: ['a ) 430 sq . m', 'b ) 425 sq . m', 'c ) 450 sq . m', 'd ) 475 sq . m', 'e ) 350 sq . m']

Ex Output:

c