A) Nautilus
B) Echinus
C) Limulus
D) Euplectella
Correct Answer: A
Solution :
Mollusc are characterised by soft body protected by a (calcareous shell, secreted by mantle), mostly they are marine and contain head. e.g., Nautilus, Sepia, Helix etc. Limulus (king crab), Echinus (sea urchin) and Euplectella (venus flower basket) belongs to phylum Arthropoda, Echinodermata and Porifera respectively.
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