The missing term of the sequence 9, 12, 11, 14, 13, _

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The missing term of the sequence 9, 12, 11, 14, 13, __, 15 is

1. 12
2. 16
3. 10
4. 17

Correct Option: B

The given sequence is based on the following pattern :

Odd position series :-
9 + 3 = 12 , 11 + 3 = 14 , 13 + 3 = ?
∴ ? = 16
Even position series :-
12 - 1 = 11 , 14 - 1 = 13 , 16 - 1 = 15
Therefore , the missing term of the sequence is 16 .