Which Is Not True About Development of the Axial Skeleton

Multiple Choice

Which is not true about development of the axial skeleton?

A) The sternum forms by fusion of the sternal bars.
B) The parietal and frontal bones develop by intramembranous ossification.
C) The sphenoid bone forms by endochondral ossification.
D) The vertebrae form secondary ossification centers at puberty.
E) The ribs and clavicles form from schlerotomes.