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 : b _ abbc _ bbca _ bcabb _ ab

A. acaa
B. acba
C. cabc
D. cacc

Answer: Option C

Explanation:

The series is bcab / bcab / bcab / bcab / bcab.

Thus, the pattern bcab is repeated.