The correct option is D Protopterus
Lung-fishes are freshwater fishe belonging to the subclass Dipnoi.
Protopterus is the genus is the African lungfishes and constitutes four species of lung-fish found in Africa. Scoliodon is the genus of shark. Latimeria is the genus of Gmbessa french. Labeo is the genus of carp.
Thus, the correct answer is option D.