Question

A vertebrate having entire cartilaginous skeleton is

• A. Scoliodon
• B. Rana
• C. Labeo
• D. Dolphin

Answer 1

The correct option is A Scoliodon

A. Scoliodon, known as Dog fish, belongs to class Chondrichthyes. Fishes belonging to this class have cartilaginous skeleton.

B. Rana, known as pond frog, has a bony skeleton.

C. Labeo, known as carp fish, belongs to class Osteichthyes. Fishes belonging to this class have a bony skeleton.

D. Dolphin is an aquatic mammal and has a bony skeleton.

So, the correct answer is 'Scoliodon'.