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: 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 rectangular field has area equal to 150 sq m and perimeter 50 m . its length and breadth must be ?
Options: ['a ) 15 m , 15 m', 'b ) 15 m , 90 m', 'c ) 16 m , 10 m', 'd ) 15 m , 10 m', 'e ) 15 m , 30 m']
Example Output: d

Example Input: Problem: the area of a rhombus is equal to the area of a rectangle whose length is 20 cm and the breadth is 10 cm . if one of the diagonals is 32 cm what is the length of other diagonal ?
Options: ['a ) 10', 'b ) 12.5', 'c ) 15', 'd ) 16', 'e ) 17.5']
Example Output:
b