Which of the following animal groups is incorrectly paired with its characteristic?

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Porifera : Central cavity called spongocoel lined by choanocytes

Mollusca : The body is covered by a chitinous exoskeleton

Cnidaria : Gastro-vascular cavity with a single opening, mouth on hypostome

Arthropoda : Jointed appendages help in locomotion

answer is B.

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Detailed Solution

Body is covered by a calcareous shell in molluscs. Body is covered by chitinous exoskeleton in arthropods.

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