Select the correct option that can fill in the blank in the below series.

96, 86, 106, 76, _______, 106, 56, 46, 106

Given: 96, 86, 106, 76, ___ , 106, 56, 46, 106

Logic: The following pattern are ......

1st sub-series: 96, 76, 56 (-20 each step)
2nd sub-series: 86, 66, 46 (-20 each step)
3rd sub-series: 106, 106, 106 (constant)

1st sub-series: 96, 76, 56 (Decreasing by -20)
96 - 20 = 76
76 - 20 = 56
2nd sub-series: 86, __, 46 (Decreasing by -20)
86 - 20 = 66 
66 - 20 = 46
3rd sub-series: 106, 106, 106 (Constant)
Therefore, the missing number is 66.
Thus, the correct option is (d) 66