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 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']

Ex Output:
b


Ex Input:
Problem: what is the max number of rectangular boxes , each measuring 5 inches by 2 inches by 7 inches , that can be packed into a rectangular packing box measuring 15 inches by 20 inches by 35 inches , if all boxes are aligned in the same direction ? 
Options: a ) 200 , b ) 350 , c ) 100 , d ) 150 , e ) 120

Ex Output:
d


Ex Input:
Problem: the ratio of the volumes of two cubes is 3375 : 1331 . what is the ratio of their total surface areas ? 
Options: a ) 225 : 121 , b ) 221 : 127 , c ) 225 : 191 , d ) 181 : 161 , e ) 81 : 182

Ex Output:

a