To answer this question, you need to know the source of quinine. Quinine is a natural alkaloid that is primarily obtained from the bark of the Cinchona tree.
Let's evaluate each option:
A. Eucalyptus - This option is incorrect because quinine is not obtained from the bark of the eucalyptus tree. Eucalyptus is known for its essential oils, but it does not produce quinine.
B. Cinchona - This option is correct. Quinine is obtained from the bark of the Cinchona tree. Cinchona bark has been traditionally used for its medicinal properties and contains quinine, which is used to treat malaria.
C. Redwood - This option is incorrect because quinine is not obtained from the bark of the redwood tree. Redwood trees are known for their tall stature and durable wood, but they do not produce quinine.
D. Bunyan - This option is incorrect because quinine is not obtained from the bark of the bunyan tree. The term "bunyan" is not specific to a particular species of tree, and there is no known association between bunyan trees and quinine production.
Therefore, the correct answer is B) Cinchona. Quinine is obtained from the bark of the Cinchona tree.