Respuesta :
The statement which is true is Protozoan diseases are usually common in cities with poor sanitation Option(b) is correct.
What is Protozoan?
Protozoan are known to be as the single cell organism they basically come in usually many shapes such as the Amoeba which can shape it size.
They actually live in a wide variety of generally most habitats such as the fresh water or the soil at definite places.
Therefore Option(b) is correct.
Learn more about Protozoan here:
brainly.com/question/24193525
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