Select the optiont thet correctly matches characteristic features with the group of three animals
A. Skeleton of spicules-Sycon, Adamsia, Spongilla
B. Excretion by flame cells- Raenia, Fascuola, Ancyolstome.
C. Mouth contains radula-Dentalium, Octopus, Ophiura
D. Jointed appendages-Limulus, Apis, Laccifer.
