Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 _ _ a a b _ a _ a _ b a
- 
                        - bbaab
- aaabb
- ababa
- babab
 
Correct Option: C
The given letter series in below pattern.
a b a
After using the pattern the complete letter series will be as below.
a b a/ab a /a b a/ a ba
 
	