The sub kingdom Parazoa includes

Porifera

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Cnidaria

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Ctenophora

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Platyhelminthes

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Both Porifera and Cnidaria

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Solution

The correct option is A
Porifera

Based on the presence of true tissues in the body, the Animal Kingdom can be broadly divided into two sub-kingdoms - Parazoa and Eumetazoa. Parazoa includes only Phylum Porifera (cellular level of organisation - cells not organised into tissues) while Eumetazoa includes all the animals in the kingdom, starting with Phylum Cnidaria, as this is where the tissue level of organisation starts.

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