Select the option that is related to the fifth number in the same way as the first number is related to the second number and the third number is related to the fourth number.

33 : 121 :: 27 : 81 :: 45 : ?

225

33 : 121 :: 27 : 81 :: 45 : ?

The  logic followed here is :

( IST NUMBER ÷ 3 )² = IIND NUMBER

AS

( 33 ÷ 3 )² = IIND NUMBER

11² = 121

AND

( 27 ÷ 3 )² = IIND NUMBER

9² = 81

SIMILARLY

( 45 ÷ 3 )² = IIND NUMBER

15² = 225