Antimalarial drug is obtained from
Artemesia annua
Artemesia annua, also known as sweet wormwood, sweet annie etc. is a common type of wormwood native to temperate Asia. It belongs to plant family Asteraceae and is an annual short day plant. The research on antimalarial drugs led to the development of Artemisinin, a compound which was extracted from Artemisia annua. Hence, the antimalarial drug is obtained from Artemesia annua. So, the correct answer is 'Artemesia annua'.