The correct answer is (b). Quinine is extracted from the bark of cinchona trees. Cinchona trees are native to South America, and their bark has been used for centuries to treat malaria. Quinine is a bitter compound that is effective in killing the malaria parasite. It is also used to treat other conditions, such as night cramps and leg cramps.
(a) Cinnamon is a spice that is obtained from the inner bark of several tree species of the genus Cinnamomum. It is used in cooking and as a flavoring agent. Cinnamon does not contain quinine.
(c) Ocimum is a genus of flowering plants in the mint family Lamiaceae. It includes many species of basil, including sweet basil, Thai basil, and lemon basil. Ocimum does not contain quinine.
(d) Acacia catechu is a tree that is native to India and Southeast Asia. Its bark is used to produce a dye and a tannin. Acacia catechu does not contain quinine.