निम्नलिखित में से किस समुद्री जीव को अपने पॉलिप चरण में लौटने की क्षमता के कारण वैज्ञानिक रूप से "जैविक रूप से अमर" माना जाता है?

Select the incorrect statements from the following: A. Digestive system in Platyhelminthes is incomplete. B. Bilateral symmetry is a characteristic feature of adult Echinoderms. C. Pseudocoelom is possessed by Aschelminthes. D. Notochord is persistent throughout life in the class Chondrichthyes. E. Members of class Reptilia maintain a constant body temperature. Choose the correct answer from the options given below:

Select the set of fishes that belong to the class Osteichthyes: