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: 6 points lie on the circumference of a ellipse . what is the positive difference between the number of triangles and the number of quadrilaterals that can be created by connecting these points ? 
Options: a ) 4 , b ) 6 , c ) 5 , d ) 15 , e ) 20

Output: c


Input: Consider Input: Problem: what is the perimeter of a square field whose diagonal is 8 √ 2 ? 
Options: a ) 82 m , b ) 32 m , c ) 27 m , d ) 26 m , e ) 76 m

Output: b


Input: Consider Input: Problem: one side of a rectangle is 3 cm shorter than the other side . if we increase the length of each side by 1 cm , then the area of the rectangle will increase by 16 cm 2 . find the lengths of all sides . 
Options: a ) 10 and 3 , b ) 9 and 6 , c ) 10 and 7 , d ) 3 and 10 , e ) 10 and 10


Output: b