Schizocoelomates and enterocoelomates are Acoelomates, Echinoderms only, True coelomates, or Invertebrates?

Coelom is the cavity inside mesoderm. On the basis of the ways the true body cavity or coelom arises in different animals, true coelom has been categorised into two types, schizocoelomates and enterocoelomates. Schizocoeloms arises as a split in the embryonic mesoderm. The body cavity is formed from the blocks of mesoderm around the gut that enlarge and hollow out. For example, animals belonging to the phylum Annelida, Mollusca, and Arthropoda. Enterocoelom arises as mesodermal pouches arising from the gut of the embryo (endoderm). This type of body cavity is formed by the out-pocketing of the primitive gut that breaks off and forms the coelom. For example, animals belonging to the phylum Echinodermata and Chordata. So, the correct answer is 'True coelomates'