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 area of sector of a circle whose radius is 12 metro and whose angle at the center is 36 â ° is ? 
Options: a ) 52.6 , b ) 45.3 , c ) 52.8 , d ) 52.1 , e ) 52.2

Ex Output:
b


Ex Input:
Problem: in a rectangular coordinate system , what is the area of a rectangle whose vertices have the coordinates ( - 5 , 1 ) , ( 1 , 1 ) , ( 1 , - 4 ) and ( - 5 , - 4 ) ? 
Options: ['a ) 20', 'b ) 30', 'c ) 40', 'd ) 55', 'e ) 48']

Ex Output:
b


Ex Input:
Problem: the diagonal of a rhombus are 62 m and 80 m . its area is : 
Options: a ) 1940 , b ) 2480 , c ) 2460 , d ) 2500 , e ) 1980

Ex Output:

b