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: tough and tricky questions : number properties . what is the smallest positive integer x such that 1512 x is the cube of a positive integer ? 
Options: a ) 7 , b ) 14 , c ) 28 , d ) 35 , e ) 49
Example Output: e

Example Input: Problem: if radius of a circle is diminished by 10 % then its area is diminished by 
Options: ['a ) 22', 'b ) 19', 'c ) 877', 'd ) 26', 'e ) 271']
Example Output: b

Example Input: Problem: a cube of edge 6 cm is cut into cubes each of edge 3 cm . the ratio of the total surface area of one of the small cubes to that of the large cube is equal to : 
Options: a ) 1 : 4 , b ) 1 : 25 , c ) 1 : 52 , d ) 1 : 522 , e ) none
Example Output:
a