Select the set of letters that, when sequentially placed in the blanks of the given letter series, will complete the letter series.
t _ n s _ r t h _ s o _ t h _ s _ r
1
h o n r n o
2
n o n r h o
3
h o r n n r
4
h o o n o r
Select the set of letters that, when sequentially placed in the blanks of the given letter series, will complete the letter series.
t _ n s _ r t h _ s o _ t h _ s _ r