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: a hall is 15 m long and 12 m broad . if the sum of the areas of the floor and the ceiling is equal to the sum of the areas of 4 walls , the volume of the hall is : 
Options: a ) 3348 , b ) 3898 , c ) 1200 , d ) 2881 , e ) 7881

Ex Output:
c


Ex Input:
Problem: the slant height of a cone is 22 cm and radius of the base is 7 cm , find the curved surface of the cone ? 
Options: a ) 426 , b ) 284 , c ) 483 , d ) 256 , e ) 428

Ex Output:
c


Ex Input:
Problem: carol and jordan draw rectangles of equal area . if carol ' s rectangle measures 12 inches by 15 inches and jordan ' s rectangle is 9 inches long , how wide is jordan ' s rectangle , in inches ? 
Options: a ) 17 , b ) 18 , c ) 19 , d ) 20 , e ) 21

Ex Output:

d