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 pair of gills are covered with an operculum and skin is covered with cycloid scales
C. Reptilla : 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

Explanation

Cyclostomes have a sucking and circular mouth without jaws. Their body is devoid of scales and paired fins.