The given figure shows a cross section of the body of an invertebra...

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The given figure shows a cross section of the body of an invertebrate. Identify the animal
\( \mathrm{P} \) which has such body cavity :-

W
(1) Cockroach (Arthropoda)
(2) Round worm (Aschclminthcs)
(3) Planaria (Platyhelminthes)
- (4) Earthworm (Annelida)
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