Coelom is absent in the class of animals termed
The correct answer is: D
Explanation
A coelom is a fluid-filled body cavity that is lined with mesodermic tissues. Coelenterates, also known as cnidarians, are acoelomates, meaning they do not have a coelom. Instead, they have a gastrovascular cavity, which is not a true body cavity. Every other animals in the options have coelum except coelenterata - Option D
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