Correct Answer:
Option C - Kokborok was declared an official language of the state of Tripura, India by the state government in the year 1979. The TTAADC has declared the Kokborok as the Official language of state on April 20, 1999. Consequently the language has been taught in schools of Tripura from primary level to the higher secondary stage since the 1980s.
C. Kokborok was declared an official language of the state of Tripura, India by the state government in the year 1979. The TTAADC has declared the Kokborok as the Official language of state on April 20, 1999. Consequently the language has been taught in schools of Tripura from primary level to the higher secondary stage since the 1980s.