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# Real organs are absent in

**(a)** Mollusca

**(b)** Coelenterata

**(c)** Arthropoda

**(d)** Echinodermata

Correct Answer: (b) Coelenterata

Explanation:

Coelenterates are radially symmetrical and motile organisms, that either live in colonies or as solitary organisms.These organisms have a coelenteron, a body cavity with only one opening. They don\'t have real organs.

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