Coelomate animals devoid of excretory organ are_______________.

Annelids

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Echinoderms

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Molluscs

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Arthropods

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Solution

The correct option is B Echinoderms
Echinoderms have a simple excretory system with no kidneys and use diffusion to rid their bodies nitrogenous waste material.
So, option B is the correct option.

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