Question

4 Snail is an example of the phylum-- --------
Human made interface
Human main interface
None of the above
All of the above

5 Octopus belongs to the class
pelecypoda
cypraca
cephalopoda
polychaeta

6 The largest class of the phylum mollusca is the class
pelecypoda
cephalopoda
polychaeta
gastropoda

Answer 1

4. Correct answer is mollusca (I suppose there's a mistake in this question). If there's no mistake, the only possible answer is "none of the above".
5. cephalopoda
6. gastropoda