In which of the following year did Nagaland, one of the 'Seven Sisters' of the North-East, come into existence as the 16th state of the Indian Republic?

1963

The correct answer is Option (3) → 1963

Nagaland officially became the 16th state of the Indian Republic on December 1, 1963.

Historical Timeline of Nagaland's Statehood:

• Pre-1957: The region was a district within the state of Assam, known as the "Naga Hills."
• 1957: Following political unrest and the formation of the Naga People's Convention (NPC), a separate administrative unit called the Naga Hills-Tuensang Area (NHTA) was created.
• 1960: The 16-Point Agreement was signed between the Government of India and the NPC, paving the way for full statehood.
• 1962: The State of Nagaland Act was passed by the Indian Parliament.
• December 1, 1963: The state was formally inaugurated by the then President, Dr. S. Radhakrishnan, at Kohima.