If the sides of a cube are in the ratio 9:5. What is the ratio of their diagonals?
Choose the correct choice from the following options:	A) 9 : 5	B) 16 : 9	C) 4 :	D) 3 : 4	E) 3 : 8

Rationale: "explanation : diagonal of a cube = a √ 3 where a is side a 1 : a 2 = 9 : 5 d 1 : d 2 = 9 : 5 where √ 3 cancelled both side answer : a"
Answer: A