Which of the following combination of phylum and description is incorrect?

Q. Which of the following combination of phylum and description is incorrect?

A.            Echinodermata-bilateral symmetry as larva, coelom present

B.            Nematoda-roundworms, pseudocoelomate

C.            Platyhelminthes- flatworms, gastrovascular cavity, acoelomate

D.            Calcarea-gastrovascular cavity, coelom present

Answer: Calcarea-gastrovascular cavity, coelom present