The phylum Cnidaria gets its name because of the presence of

Gastrovascular cavity

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Stinging cells

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Metagenesis

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Tentacles

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Solution

The correct option is B Stinging cells
Cnidarians possess stinging cells, called cnidocytes or cnidoblasts, which contain stinging capsules or nematocytes. These cnidocytes are present on the tentacles and the body, and are used for anchorage, defense and for the capture of prey. The former name of the phylum was "Coelenterata", which refers to the gastrovascular cavity or "coelenteron" of the animals in this group.

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