When Tripura was Made a Full-Fledged State of India?
Option 1 is the right answer.
Tripura is a state in Northeast India. The third-smallest state in the country, it covers 10,491 km2 (4,051 sq mi) and is bordered by Bangladesh (East Bengal) to the north, south, and west, and the Indian states of Assam and Mizoram to the east. In 2011 the state had 3,671,032 residents, constituting 0.3% of the country’s population. Indigenous communities, known in India as scheduled tribes, form about 30 per cent of Tripura’s population. The Kokborok speaking Tripuri people are the major group among 19 tribes and many subtribes. The Bengali people form the ethno-linguistic majority in Tripura.
After India’s independence, the princely state of Tripura was merged with the Union of India in 1949. Tripura became a Union Territory on 1 July, 1963, and attained the status of a full-fledged state on 21 January, 1972.