a. The rain forest of North-East India
b. Sunderbans
c. The Thar Desert
d. Western Ghats
Answer: a. The rain forest of North-East India.
Explanation: Nepenthes khasiana is a type of pitcher plant found in India. It is found only in the rain forests of North-East India (Jaintia hills, Garo hills and the Mawlynong region in the Eastern Khasi hills of Meghalaya.