A) Physalia
B) Aurelia
C) Gorallium
D) Halistemma
Correct Answer: C
Solution :
Coral animals or corals are marine, mostly colonial, polyploid coelenterate, living in a secreted calcareous skeleton (made up of \[\text{CaC}{{\text{O}}_{\text{3}}}\]) of their own, eg, Corallium (precious red coral) is used in jewellery, Tubipora (organ pipe coral), etc.
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