The correct option is C Pterygoid
A coracoid is a paired bone, which is part of the shoulder assembly in all vertebrates except therian mammals. In therian mammals, a coracoid process is present as part of the scapula, but this is not homologous with the coracoid bone of most other animals.
The arytenoid cartilages are a pair of small three-sided pyramids, which form part of the larynx, to which the vocal cords are attached. These allow and aid in the vocal cords movement.
Pterygoid bones are two palatine bones extending downwards from each side of the sphenoid bone within the skull.
The atlas is the topmost vertebra and with the axis forms the joint connecting the skull and spine.