2 corals belong to phyla
(a) cnidaria
(b) poriferans
(c) mollwea
(d) Annelida
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A phylum Cnidaria
Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. Corals species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
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Corals are marine colonial polyp cnidarians with radial symmetry, diploblastic body plan and gastrovascular cavity with one opening. Porifera phylum is characterized by an asymmetrical body with loosely arranged cells and the presence of central cavity with osculum. Molluscs are bilaterally symmetrical, triploblastic organisms with organ system and complete digestive tube. Protozoans are unicellular eukaryotic organisms.
Thus, the correct answer is option-A
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