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 : c _ bbb _ _ abbbb _ abbb _

A. aabcb
B. abccb
C. abacb
D. bacbb

Answer: Option B

Explanation:

The series is cabbbb / cabbbb / cabbbb.

Thus, the pattern cabbbb is repeated.