Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 — n m m n — m m n n — m n n m —
- 
                        - n n m m
- n m n m
- m n n m
- n m m n
 
Correct Option: A
As per given question, the letter series is following the below pattern.
n n m m
The pattern n n m m is repeated. 
Using the same pattern, we will get complete letter series.
n n m m/n n m m/n n mm/ n n m m
 
	