Select the combination of letters that when sequentially placed in the blanks of the given series will logically complete the series.
A _ A _ C A B _ B _ A _ _ B C A B A _ C

Correct option is C

Given:
To complete the series A _ A _ C A B _ B _ A _ _ B C A B A _ C
letters from the options given. Let's consider each option and see if it fits the series sequentially:
(a) BBACABB
(b) BBABBCB
(c) BBACBAB
(d) BABACBA 1. Option (a) BBACABB: - placing BBACABB in the continuous in the blanks: A B A B C/ A B A B A/ A C B B C/ A B A A C
This option does not fit the series.
2. Option (b) BBABBCB: - placing BBABBCB in the continuous in the blanks: A B A B C /A B A B B/ A B C B C /A B A C C
This option does not fit the series.
3. Option (c) BBACBAB: - placing BBACBAB in the continuous in the blanks: A B A B C / A B A B C / A B A B C / A B A B C
This option fits the series.
Logic is(A B A B C) repletion of this letter cluster.