The correct answer is: a) Arunachal Pradesh.
The North-East Frontier Agency (NEFA) was established by independent India in 1954 to administer the regions that later became Arunachal Pradesh. NEFA was a centrally administered territory, which means that it was directly under the control of the central government of India. It was not a part of any state.
In 1972, NEFA was granted statehood and became the state of Arunachal Pradesh. Arunachal Pradesh is located in the easternmost part of India, and it is bordered by China, Bhutan, Myanmar, and Assam. It is a mountainous state with a population of over 1.3 million people. The majority of the population is tribal, and the official language is Hindi.
Arunachal Pradesh is a beautiful state with a rich culture and history. It is a popular tourist destination, and it is known for its natural beauty, its wildlife, and its traditional festivals.
The other options are incorrect because:
- Assam is a state in northeastern India. It is bordered by Arunachal Pradesh to the north, Nagaland to the northeast, Manipur to the east, Mizoram to the southeast, Tripura to the south, Meghalaya to the southwest, and West Bengal to the west. The state has a population of over 31 million people, and the capital is Guwahati.
- Nagaland is a state in northeastern India. It is bordered by Assam to the north, Manipur to the east, and Myanmar to the south and west. The state has a population of over 1.9 million people, and the capital is Kohima.
- Sikkim is a state in northeastern India. It is bordered by Bhutan to the north, China to the east, Nepal to the west, and West Bengal to the south. The state has a population of over 600,000 people, and the capital is Gangtok.