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 a square is equal to five times the area of a rectangle of dimensions 20 cm * 16 cm . what is the perimeter of the square ? 
Options: a ) 289 cm , b ) 160 cm , c ) 829 cm , d ) 288 cm , e ) 289 cm

Ex Output:
b


Ex Input:
Problem: a rectangular farm has to be fenced one long side , one short side and the diagonal . if the cost of fencing is rs . 14 per meter . the area of farm is 1200 m 2 and the short side is 30 m long . how much would the job cost ? 
Options: a ) 1276 , b ) 1680 , c ) 2832 , d ) 1299 , e ) 1236

Ex Output:
b


Ex Input:
Problem: in a parallelogram , the length of one diagonal and the perpendicular dropped on that diagonal are 30 and 20 metres respectively . find its area 
Options: ['a ) 600 m 2', 'b ) 540 m 2', 'c ) 680 m 2', 'd ) 574 m 2', 'e ) none of these']

Ex Output:

a