The correct option is D Anthozoa
Anthozoa is a class belongs to the Cnidaria. They do not possess medusa stage in their development. They release sperm and eggs that form a planula (larva). Most of the corals fall under this class Anthozoa like stony corals, coral reefs etc. They are attached to the substrate and feed by the water current that brings them an abundance of food. Small fish and tiny zooplanktons form the primary diet. Corals can multiply both asexually and sexually
Therefore, the correct answer is option C.