Organisms belonging to phylum Mollusca are ........... and have bilateral symmetry.
A
Diplobastic
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B
Triploblastic
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C
No germ layer
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D
None of the above
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Solution
The correct option is C Triploblastic Organisms belong to phylum Mollusca are triploblastic (i.e., three layers of the cell) and their body shows bilateral symmetry except Pila which is asymmetric.