In the following question, out of the following alternatives, select the alternative which is the best substitute of the phrase.
Animals that have spinal column are called 'Vertebrate.' So option 3 is correct.
Reptiles => a vertebrate animal of a class that includes snakes$
Amphibians => a cold-blooded vertebrate animal of a class that comprises the frogs, toads$
Invertebrate => an animal lacking a backbone, such as an arthropod, mollusc$