The class of mollusca with closed type of blood vascular system is

Cephalopoda

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Gastropoda

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Scaphopoda

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Pelecypoda

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Solution

The correct option is A Cephalopoda
Most animals within the Mollusca Phylum have an open circulatory system. Cephalopods have a closed circulatory system. Within a open circulatory system blood is not restricted to circulating within the blood vessels.

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