Rajpal and Rampal are two brothers. Sunita is the sister-in-law of Rajpal. Ragubir is the father of Sunita. Sunita is the only sister of Vikram. Harsh is the only son of Sunita. How is Rampal related to Harsh?
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
S O _ _ T A S _ _ A T A _ _ N A T _ _ O N A _ _