Chitinous covering or perisarc is present in

Obelia

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Hydra

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Aurelia

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Physalia

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Solution

The correct option is A Obelia
Obelia is a genus of hydrozoans, which consists mainly of marine and some freshwater animal species. The main stalky body of the colony is composed of a coenosarc, which is covered by a protective perisarc.

So, the correct answer is 'Obelia'

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