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Question

Which of the following is a disease caused by protozoans?

A
Typhoid
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B
Polio
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C
Tuberculosis
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D
Malaria
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Solution

The correct option is D Malaria
Protozoans are eukaryotic, unicellular microorganisms. Most of them are free-living, found in soil and fresh water, while some are parasitic and cause diseases in plants and animals. Malaria is caused by the protozoan parasite, Plasmodium.
Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis.
Polio is a highly contagious infectious disease caused by polio virus.
Typhoid fever is an acute infectious illness associated with fever that is most often caused by the Salmonella typhi bacteria.

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