Which phylums have
a) acoelom.
b) coelom
c) pseudocoelem.
d) haemocoel.
Please give answer the Meritnattion Study material was not clear for me

Dear student a). Acoelomate animals are called acoelomates and they have no true body cavity. The acoelomate phyla are Placozoa , Porifera , Cnidaria ,etc. b).The coelomate phyla are Entoprocta, Ectoprocta, Phoronida, Mollusca, Priapulida, Echiura, Annelida, Tardigrada, Pentastoma, Onychophora, Arthropoda ,etc. c).The pseudocoelomate phyla are Gastrotricha, Rotifera, Nematoda, Nematomorpha, etc. d). Haemocoel is present in the phylum Arthropoda. Regards