Direction: In the following two questions, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
- 
					 ab__dda__ccd__bb__d__
- 
                        - ccaac
- cbaca
- cbcba
- cbbcd
 
Correct Option: B
As per given question, the letter series is following the below pattern.
a b c d d
After using the pattern the complete letter series will be as below.
a b c d d/ a b c c d/ a b b c d/ a
 
	