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: a rectangular farm has to be fenced one long side , one short side and the diagonal . if the cost of fencing is rs . 15 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 ) 1200', 'c ) 2832', 'd ) 1800', 'e ) 1236']
Example Output: d

Example Input: Problem: rectangular tile each of size 80 cm by 55 cm must be laid horizontally on a rectangular floor of size 210 cm by 330 cm , such that the tiles do not overlap and they are placed with edges jutting against each other on all edges . a tile can be placed in any orientation so long as its edges are parallel to the edges of floor . no tile should overshoot any edge of the floor . the maximum number of tiles that can be accommodated on the floor is : 
Options: a ) 26 , b ) 16 , c ) 18 , d ) 19 , e ) 20
Example Output: b

Example Input: Problem: what is the smallest positive perfect square that is divisible by 4 , 10 , and 18 ? 
Options: ['a ) 900', 'b ) 1,600', 'c ) 2,500', 'd ) 3,600', 'e ) 4,900']
Example Output:
a