Which one of the following terms applies to the phylum Nematoda?

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The phylum Nematoda is characterized by having a pseudocoelom, which is a fluid-filled body cavity that is not completely lined by mesoderm. Nematodes do not have a true coelom. Parazoa refers to a subkingdom that includes sponges, which are animals lacking true tissues. Diploblastic organisms have only two germ layers (ectoderm and endoderm), while most higher animals have a third germ layer called mesoderm. Deuterostome refers to a type of embryonic development in which the anus forms before the mouth, which is seen in echinoderms and chordates, but not in nematodes.

Which One of the Following Terms Applies to the Phylum