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 diagonal of a rectangle is 41 cm and its area is 20 sq . cm . the perimeter of the rectangle must be : 
Options: ['a ) 18 cm', 'b ) 28 cm', 'c ) 30 cm', 'd ) 38 cm', 'e ) 42 cm']

Ex Output:
a


Ex Input:
Problem: what will be the cost of building a fence around a square plot with area equal to 289 sq ft , if the price per foot of building the fence is rs . 57 ? 
Options: a ) 3944 , b ) 920 , c ) 7290 , d ) 3876 , e ) 3729

Ex Output:
d


Ex Input:
Problem: when 732 is subtracted form the square of a number , the answer that is obtained is 5280 . what is the number ? 
Options: ['a ) 228', 'b ) 103', 'c ) 286', 'd ) 122', 'e ) 102']

Ex Output:

b