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: the area of a triangle is with base 10 m and height 10 m ? 
Options: a ) 11 , b ) 10 , c ) 50 , d ) 122 , e ) 12

Output: c


Input: Consider Input: Problem: the parameter of a square is equal to the perimeter of a rectangle of length 22 cm and breadth 20 cm . find the circumference of a semicircle whose diameter is equal to the side of the square . 
Options: a ) 23.56 , b ) 33.0 , c ) 23.55 , d ) 23.53 , e ) 23.57

Output: b


Input: Consider Input: Problem: how many odd numbers between 10 and 900 are the squares of integers ? 
Options: a ) 12 , b ) 13 , c ) 14 , d ) 15 , e ) 16


Output: b