Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 a_ b_abb _ ab _ a _ bba
- 
                        - bbaab
- babba
- baaba
- aabba
 
Correct Option: C
The pattern of given letter series is :-
a b b a
After using the pattern the complete letter series will be as below.
a b b a/ a b b a/ a b b a/ a b b a
 
	