What is common to the following plants:
Nepenthes, Psilotum, Rauwolfia, and Aconitum?

1. All are ornamental plants

2. All are phylogenetic link species

3. All are prone to overexploitation

4. All are exclusively present in the Eastern Himalayas

Ans. (c) All of the above plants are prone to over-exploitation due to their respective properties. Nepenthes (pitcher plant) is an insectivorous plant. Psilotum is a pteridophyte and Aconitum is a medicinal plant.