Which one among the following Biosphere Reserves is spread over three states in India?

The Nilgiri Biosphere Reserve is spread across three states — Tamil Nadu, Kerala and Karnataka. It was the first biosphere reserve in India, established in 1986, and includes the Mudumalai, Bandipur, Nagarhole, Mukurthi and Silent Valley national parks. Dehang Debang lies entirely in Arunachal Pradesh, Nokrek is in Meghalaya, and Seshachalam is in Andhra Pradesh — all confined to single states.