89, 78, 86, 80, 85, 82, 83

Question: 89, 78, 86, 80, 85, 82, 83
[A].

83

[B].

82

[C].

86

[D].

78

Answer: Option C

Explanation:

The correct pattern is – 11, + 9, – 7, + 5, – 3, + 1.

So, 86 is wrong and must be replaced by (78 + 9) i.e. 87.