Q: 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: find the perimeter and area of a square of side 9 cm . 
Options: a ) 36 , b ) 49 , c ) 64 , d ) 81 , e ) 100
A:
d