question: aquatic animals:oviparous animals
choices.label: A B C D
choices.text: coelenterates:mollusks crustaceans:arthropods flying animals:mammals vertebrates:invertebrates
explanation: some "aquatic animals" can be "oviparous animals", and some "oviparous animals" can also be "aquatic animals". both "coelenterates" and "mollusks" belong to invertebrates, but in addition to "coelenterates" and "mollusks", there are other invertebrates. "crustacea" belongs to a class of the phylum "arthropods", and "arthropods" are not "crustaceans". some "flying animals" are also "mammals", and some "mammals" are also "flying animals". "vertebrates" conflicts with "invertebrates".
relation: aquatic animals oviparous animals R2.7
relation: coelenterates mollusks R2.6
relation: crustaceans R2.2
relation: flying animals mammals R2.7