Atavistic epiphysis is a/an

Which of the following is not a function of the endoskeleton?

The vertebra which bears the whole weight of the skull is

Find out the true and false statements.
$(A)$ Human skeleton has $206$ bones
$(B)$ There are $12$ pairs of ribs in human beings
$(C)$ Sternum is present on the dorsal side of the body
$(D)$ All mammals (except a few) have $8$ cervical vertebrae
$(E)$ Ribs are bicephalic

Which pair of ribs is not connected ventrally?

In mammals,the largest vertebra is