Select the option that correctly matches characteristics/features with the group of three animals.
Jointed appendages - Limulus, Apis, Laccifer
Mouth contains radula - Dentalium, Octopus, Ophiura
Skeleton of spicules - Sycon, Adamsia, Spongilla
Excretion by flame cells - Taenia, Fasciola, Ancylostoma

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, specialized cells called flame cells help in excretion. Taenia and Fasciola are platyhelminths whereas Ancylostoma is an aschelminth. In molluscs, the mouth contains a file-like rasping organ for feeding called radula. Dentalium and Octopus are molluscs whereas Ophiura is an echinoderm. Arthropoda have jointed appendages. Limulus, Apis, and Laccifer all three are arthropods.