Which of the following combinations of a phylum and its description is incorrect?

• A. Phyum Cnidaria - diploblastic and radial symmetry
• B. Phylum Platyhelminthes - triploblastic and acoelomate
• C. Phylum Porifera - asymmetrical and spongeocoel
• D. Phylum Nematoda - triploblastic vertebrates

Answer: (D)