Choose the correct option:
Choose Your Option
A. Ctenophores and Platyhelminthes possess complete digestive system.
B. Aschelminthes to Chordates, all possess organ system level of organization along with complete digestive system.
C. Coelenterates and Aschelminthes possess organ system level of organization along with complete digestive system.
D. Poriferans may possess complete digestive system.