Which animal has unpaired lungs

Options

A. Monkey
B. Whale
C. Some frogs
D. Some snakes

Answer

D

Explanation

Some snakes have unpaired lings. Respiration by lungs called pulmonary respiration. Lungs are found in all vertebrates except fishes. In lungfishes such as protopterus, Neoceratodus and lepidosiren air bladder are found which is modified lung.