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

11 : 81 : : ? : 121 : : 8 : 36

13

11 : 81 : : ? : 121 : : 8 : 36

The logic followed here is :

(Ist number - 3 )² = IInd number

As

(11 - 2 )² = 9² = 81

and  8 : 36

(8 - 2 )² = 6² = 36

Similarly

? : 121

(13 - 2 )² = 11² = 121