A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: B
Solution :
Several species of Plasmodium cause malaria and it is a infectious disease. But, Plasmodium like germs of other infectious disease, (such as cholera and smallpox etc.) does not produce antibodies or antitoxins in human blood. Therefore, treatment of malaria by inoculations or vaccinations is out of question. Quinine is used for the cure of malaria for as long as 300 years.
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