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: if circles x and y have the same area and circle x has a circumference of 12 π , half of the radius of circle y is : 
Options: a ) 16 , b ) 8 , c ) 3 , d ) 2 , e ) 1

Output: c


Input: Consider Input: Problem: the length of a rectangle is increased by 45 % and its breadth is decreased by 20 % . what is the effect on its area ? 
Options: a ) 1288 , b ) 1299 , c ) 1000 , d ) 10000 , e ) 11600

Output: e


Input: Consider Input: Problem: what is the measure of the radius of the circle inscribed in a triangle whose sides measure 8 , 15 and 19 units ? 
Options: a ) 2.8 units , b ) 6 units , c ) 3 units , d ) 5 units , e ) 12 units


Output: a