Among the following options given below, identify the specific bone situated within the skull.
Atlas
Coracoid and frontal
Pterygoid and frontal
Aretynoid and parietal
Option 3 states that the pterygoid and frontal bones are situated within the skull. Within the human skull, the pterygoid bone is a small, wing-shaped bone located in the cranial base. It is involved in forming part of the lateral walls of the nasal cavity and the floor of the eye sockets (orbit). The frontal bone, on the other hand, forms the forehead and the upper portion of the eye sockets. Therefore, Option 3 is the correct answer.