The correct option is D (1) Platyhelminthes, (2) False coelom, (3) Triploblastic
In the animal kingdom, different phyla have different characteristics. For example,
∙ Phylum Platyhelminthes - The animals belonging to this phylum are triploblastic. They lack body cavity and hence are called acoelomates.
∙ Phylum Nematoda - The animals belonging to this phylum are triploblastic but they have a body cavity lined by patches of mesoderm. Thus they are considered as psuedocoelomates.
∙ Phylum Annelida - The animals belonging to this phylum are triploblastic with true body cavity , hence coelomate (or eucoelomates).