Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 a b – – b a a – – a b –
- 
                        - b a a b b
- a a b a b
- a a b a a
- a a a a a
 
Correct Option: C
As per given question, the letter series is following the below pattern.
a b a
The pattern aba is repeated. 
After using the pattern the complete letter series will be as below.
a b a / a b a  /a b a/ a ba 
 
	