1.  In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative : abca _ bcaab _ aa _ caa _ c

A. bbac
B. bbaa
C. acbb
D. acac

Answer: Option C

Explanation:

The series is a / bcaa / bcaa / bcaa / bcaa / bc.

Thus, the pattern bcaa is repeated.