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

I81 : K121 :: D16 : F36 :: O225 : ?

Q289

Pattern followed is :

I81 : K121

I(9) +2 : (11)K & 9²  : (9+2)²

I9² : K (9+2)²

I81 : K121

&  D16 : F36

D(4) +2 : (6)F & 4²  : (4+2)²

D4² :  F(4+2)²

D16 : F36

Similarly ,

O225 : ?

O(15) + 2 = (17)Q &  15²  : (15+2)²

O15² : Q(15+2)²

O225 : Q289

Q289 , is correct answer .