Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series.
S _ _ A R _ O _ A _ _ O N _ R1
NOSNRSA
2
ONSNRSA
3
ONSNSRA
4
ONSNRAS
Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series.
S _ _ A R _ O _ A _ _ O N _ R