Which one of the following groups of animals is correctly matched with its characteristic feature without any exception ?

Options

A. Reptilla : possess 3-chambered heart with an incompletely divided ventricle
B. Chordata : possess a mouth with an upper and a lower jaw
C. Chondrichthyes : possess cartilaginous endoskeleton,
D. Mammalia : give birth to young ones.

Answer

C

Explanation

Reptiles usually possess 3-chambered heart but crocodiles are an exception with 4-chambered heart. Not all chordates have a mouth with upper and lower jaw. Egg laying mammals include duck-billed platypus. Chondrichthyes (cartilaginous fishes) are the fishes that have cartilaginous endoskeleton. there is no exception to this.