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.

__bb__c__bg__b__g
A. cbgbc
B. cgbcb
C. cgbcc
D. gbcbb

Answer: Option B

Explanation:

Pattern of the series as shown below

cbbg/cbbg/cbbg=> cgbcb

Hence, the missing letters are cgbcb.