In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: the area of the largest circle that can be drawn inside a rectangle with sides 18 cm by 14 cm is 
Options: ['a ) 237', 'b ) 154', 'c ) 2376', 'd ) 198', 'e ) 171']
Example Output: b

Example Input: Problem: the area of an isosceles trapezoid with sides of length 5 and bases of length 9 and 15 is ? 
Options: a ) 44 , b ) 48 , c ) 46 , d ) 47 , e ) 50
Example Output: b

Example Input: Problem: the breadth of a rectangular field is 60 % of its length . if the perimeter of the field is 800 m . what is the area of the field ? 
Options: ['a ) 18750 sq . m', 'b ) 37500 sq . m', 'c ) 40000 sq . m', 'd ) 48000 sq . m', 'e ) none of these']
Example Output:
b