Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
- 
					 — stt — tt — tts —
- 
                        - tsst
- sstt
- ttst
- tsts
 
Correct Option: A
The pattern of given letter series is :-
t st
Using the same pattern, we will get complete letter series.
t st / t s t / t s t /  t  s t 
 
	