Jellyfish and Corals both belong to Phylum Cnidaria thus, they are known as Cnidarians.
They both possess radial symmetry and in their defense mechanism they both use stinging tentacles which release venom for their protection. Due to this reason they are known as Nettle Animals.
Therefore the right statement is "Option C Both are cnidarians".
Good afternoon, Nicol3713. I think the answer would be B - Rough ER because the bound ribosomes are attached to the rough ER or nuclear envelope. It should be right. Let me know if you need any more help. Have a great day!!