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

Example Input: Problem: an equilateral triangle and three squares are combined as shown above , forming a shape of area 48 + 4 √ 3 . what is the perimeter of the shape formed by the triangle and squares ? 
Options: ['a ) 18', 'b ) 27', 'c ) 36', 'd ) 48', 'e ) 64']
Example Output: c

Example Input: Problem: the diagonal of a rhombus are 65 m and 60 m . its area is : 
Options: a ) 1940 , b ) 1950 , c ) 1960 , d ) 1990 , e ) 1980
Example Output: b

Example Input: Problem: if the sides of a triangle are 26 cm , 24 cm and 15 cm , what is its area ? 
Options: a ) 120 , b ) 772 , c ) 180 , d ) 266 , e ) 2848
Example Output:
c