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: a and b are two circles . the radius of a is four times as large as the diameter of b . what is the ratio between the areas of the circles ?
Options: ['a ) 1 : 8 .', 'b ) 1 : 2 .', 'c ) 1 : 24 .', 'd ) 1 : 64 .', 'e ) 1 : 6 .']

Output: d

Input: Consider Input: Problem: find the area of a parallelogram with base 18 cm and height 10 cm ?
Options: a ) 281 , b ) 284 , c ) 288 , d ) 255 , e ) 180

Output: e

Input: Consider Input: Problem: what positive number , when squared , is equal to the cube of the positive square root of 14 ?
Options: a ) 64 , b ) 32 , c ) 8 , d ) 4 , e ) 2
Output: d