Correct Answer:
Option B - The state of Arunachal Pradesh was previously known as North-East Frontier Agency. On 20 January 1972. It became the Union Territory of Arunachal Pradesh and on 20 February 1987, it got the status of state of India.
B. The state of Arunachal Pradesh was previously known as North-East Frontier Agency. On 20 January 1972. It became the Union Territory of Arunachal Pradesh and on 20 February 1987, it got the status of state of India.