Which among the following is incorrect about classification on the basis of coelom?

• A. Coelom is the cavity between the body wall and gut wall
• B. Animals are divided into coelomates, acoelomates and pseudocoelomates
• C. Coelom is the fluid filled space other than lymph vessels and blood vessels
• D. In coelomates, cavities between the gut wall and mesoderm is absent