1. 

In the following question, a letter series is given. Some of the letters of the series are missing. This missing letters are given in same order as one of the four/five alternatives below the series. Find out the correct alternative.

B__CCABB__CABBC__AB__CCA
A. BBBC
B. BBCC
C. BCCB
D. BCBC

Answer: Option C

Explanation:

Pattern of the series as shown below

BBCCA/BBCCA/BBCCA/BBCCA => BCCB

Hence, the missing letters are BCCB.