5, 16, 6, 16, 7, 16, 9

Question:
5, 16, 6, 16, 7, 16, 9

[A].

9

[B].

7

[C].

6

[D].

None of these

Answer: Option A

Explanation:

Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.

So, 9 is wrong.