What is common between parrot, platypus and kangaroo ?

Options

A. Toothless jaws
B. Functional postanal tail
C. Oviparity
D. Homoiothermy

Answer

D

Explanation

Parrot belongs to the Class Aves whereas platypus and kangaroo belong to the class Mammalia. Both aves and mammals are homoiotherms, i.e., the temperature of their body remains constant irrespective of the temperature of the environment.