What are the three bones that form the sternum?

There are more than 3 bones that form the cranial bones. There 6 bones that make up the cranial bone. Ethmoid bone, Frontal bone, Occipital bone, Parietal bone, Sphenoid bone, Temporal bone.

manubrium, body, xiphoid process

the zualack bone, phacidal bone, and racianla bone

manubrium, the body and the xiphoid

Ilium, ischium, and pubis