The correct option is D Hyoid is not included in skull bones
Hyoid bone is an intermediary between the skull and postcranial skeleton.
It is a single U-shaped bone which is present at the base of the buccal cavity. It is not attached by another bone.
Skull is composed of two sets bones. They are cranial bones(8) and facial bones(14). It includes 6 ear ossicles.
Human skull has two occipital condyles which connects to atlas (first vertebrae), thus known as dicondylic skull.
So, the correct answer is 'hyoid is not included in skull in skull bones'.