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

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

1.Mammalia : give birth to young ones

2.Reptilia : possess 3-chambered heart with one incompletely divided ventricl

3.Chordata : possess a mouth provided with an upper and a lower jaw

4.Chondrichthyes : possess cartilaginous endoskeleton


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