Q. Which one of the following was initially the most powerful city state of India in the 6th century B.C.?
Answer:
Magadh
Notes: Of the 16 Mahajanapadas, Magadha, Kosala, Vatsa and Avanti were more powerful. They fought amongst themselves for years and ultimately Magadha emerged victorious under Bimbisara (Haranyak dynasty) in 6th C BC.