A. Nilgiri
B. Agastyamala
C. Eravikulam
D. Chinnar
✅ The correct answer is option A.
Nilgiri Biosphere Reserve located in Tamil Nadu, Kerala and Karnataka was the first biosphere reserve established in 1986.
Nilgiri Biosphere Reserve located in Tamil Nadu, Kerala and Karnataka was the first biosphere reserve established in 1986.