Fishes coming under which of the following classes are called Osteichthyes?

Correct option is C

Correct Answer: (c) Teleostomii
Explanation:
→ Teleostomii includes the bony fishes, collectively known as Osteichthyes.
→ Possess bony skeleton, operculum, and swim bladder.
→ Largest group of fishes with tremendous diversity.
Information Booster:
→ Includes teleosts—the most advanced bony fishes.
→ Found in all aquatic ecosystems, marine and freshwater.
→ Major contributors to global fisheries.
Additional Information (Other Options):
(a) Holocephalii: Chimaeras (cartilaginous fishes).
(b) Acanthodi: Extinct spiny sharks.
(d) Dipnoi: Lungfishes, subclass of Osteichthyes but not the defining class.