Select the option that correctly matches characteristic features...

In poriferans, the body is supported by a skeleton made up of spicules or spongin fibres. Sycon and Spongilla are examples of poriferans, whereas Adamsia is a coelenterate. In platyhelminths, specialised cells called flame cells help in excretion. Taenia and Fasciola are platyhelminths whereas Ancylostoma is an aschelminth. In molluscs, mouth contains a file-like rasping organ for feeding called radula. Dentalium and Octopus are molluscs whereas Ophiura is an echinoderm. Arthropods have jointed appendages. Limulus, Apis and Laccifer all three are arthropods.