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

Question

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