Which of the following classes is incorrectly matched with its general characters ?

Options

A. Cyclostomata : Lack jaws and paired fins and body is covered with placoid scales.
B. Osteichthyes : Four pairs of gills are covered with an operculum and skin is covered with cycloid scales.
C. Reptilia : Tympanum represents ear and fertilisation is internal.
D. Aves : Endoskeleton is fully ossified and long bones are hollow with air cavities called as pneumatic bones.

Answer

A