Correct Answer - Option 3 : 90
The logic follows here is:
In Row 1:
(First number)4 = second number + third number
(3)4 = 45 + 36
81 = 81
In Row 2:
(4)4 = ? + 166
256 = ? + 166
? = 256 - 166
? = 90
In Row 3:
(2)4 = 3 + 13
16 = 16
Hence, the correct answer is "90".