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

Problem: rectangle a has sides a and b , and rectangle b has sides c and d . if a / c = b / d = 3 / 4 , what is the ratio of rectangle a ’ s area to rectangle b ’ s area ? 
Options: a ) 3 / 4 , b ) 9 / 16 , c ) 16 / 3 , d ) 4 / 3 , e ) 3 / 16
b

Problem: if a number is subtracted from its square we get 272 . find the number ? 
Options: ['a ) 7', 'b ) 21', 'c ) 19', 'd ) 15', 'e ) 17']
e

Problem: what is the diagonal of a square field whose perimeter is 24 m ? 
Options: ['a ) 8 m', 'b ) 2 m', 'c ) 7 m', 'd ) 10 m', 'e ) 6 √ 2 m']

e