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: in how many q ways can 5 people from a group of 6 people be seated around a circular table 
Options: ['a ) 56', 'b ) 80', 'c ) 100', 'd ) 120', 'e ) 144']
Example Output: e

Example Input: Problem: the radius of the base of cone is 3 cm and height is 4 cm . find the volume of the cone ? 
Options: ['a ) 12', 'b ) 75', 'c ) 97', 'd ) 15', 'e ) 91']
Example Output: a

Example Input: Problem: the diameter of a cylindrical tin is 10 cm and height is 5 cm . find the volume of the cylinder ? 
Options: a ) 125 , b ) 155 , c ) 130 , d ) 120 , e ) 100
Example Output:
a