Consider the given two statements: 

Assertion (A): Roundworms are considered pseudocoelomates.
Reason (R): They have a body cavity not lined with mesoderm.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Phylum Aschelminthes | Basis of Classification |
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Cnidarians, Ctenophores and Echinoderms resemble each other in:
I: having radial symmetry in adults and larvae
II: having three germ layers
III: lacking a coelom
 
1. Only I and II are correct
2. I, II and III are incorrect
3. Only I is correct
4. I, II and III are correct

Subtopic:  Basis of Classification:I | Phylum Aschelminthes |
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