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: in 2 triangle , the ratio of the areas is 4 : 3 and that of their heights is 3 : 4 . find the ratio of their bases ? 
Options: a ) 10 : 8 , b ) 11 : 8 , c ) 16 : 9 , d ) 17 : 19 , e ) 17 : 10

Ex Output:
c


Ex 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']

Ex Output:
e


Ex Input:
Problem: a rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered . if the area of the field is 80 sq . feet , how many feet of fencing will be required ? 
Options: a ) 28 , b ) 40 , c ) 68 , d ) 88 , e ) 78

Ex Output:

a