Which of the following classes do not belong to the phylum mollusca?

Monoplacophora

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Gastropoda

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Trematoda

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Pelecypoda

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Solution

The correct option is C Trematoda
Trematoda is a class within the phylum Platyhelminthes. It is a flatworm which is triploblastic in nature. These are acoelomate and has flame cells for excretion. These are parasitic in nature. So, the correct answer is option C.

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