question_answer

Which one of the following groups of animals is" correctly matched with its one characteristic feature without even a single exception?

A) Chordata      ?possess a mouth provided with an upper and a lower Jaw

B) Chondrichthyes?possess cartilaginous endoskeleton

C) Mammalia    ? give birth to young ones

D) Reptilia       ?possess 3-chambered heart with one incompletely divided ventricle