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B
Presence of pseudocoel
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C
Radial symmetry
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D
Bilateral symmetry
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Solution
The correct option is C Absence of body cavity Platyhelminthes do not have body cavity so they are acoelomates. In annelids, the body cavity is true and schizocoelous. Both annelids and platyhelminthes have bilateral symmertry.
So, the correct answer is 'Absence of body cavity'.