The correct option is C Rauwolfia
An endangered species can be defined as any species of plant or animal which is at the risk of extinction due to its low number. Rauwolfia is a source of antihypertensive drug reserpine. Rauwolfia serpentina number is declining due to the collection for its medicinal uses. Lycopersicum is a commonly cultivated genus of family Solanaceae. Dalbergia and Cedrus are common timber yielding plants. Thus, the correct answer is option D.