In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: how many internal diagonals does a hexagon ( 6 sided polygon ) have ? 
Options: a ) 5 , b ) 6 , c ) 8 , d ) 9 , e ) 10

Output: d


Input: Consider Input: Problem: the cost of the paint is rs . 36.50 per kg . if 1 kg of paint covers 16 square feet , how much will it cost to paint outside of a cube having 8 feet each side . 
Options: a ) rs . 850 , b ) rs . 860 , c ) rs . 876 , d ) rs . 886 , e ) none of these

Output: c


Input: Consider 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 680 sq . feet , how many feet of fencing will be required ? 
Options: a ) 34 , b ) 40 , c ) 68 , d ) 88 , e ) 98


Output: d