Bone related with skull is:

The correct answer is Pterygoid.

Concept-
Skull

• It is the bony framework of the head. 
• It is composed of two sets of bones (cranial and facial) that form total of 22 bones.
• Cranial bones are 8 in number that forms the hard protective outer covering for the brain.
• Facial bones are 14 in number which forms the front part of the skull.

Explanation-

• Pterygoid bone 
  • The pterygoid bone is a palate bone found in many vertebrates. 
  • The pterygoid bone is present behind palatine bone.
  • Within the skull, the pterygoid bones are two palatine bones that extend downwards from each side of the sphenoid bone.
  • The bones attached with chew muscles are called pterygoid bones.
  • They form the front part of the skull.
  • Pterygoid bone is a facial bone.
• Coracoid bone
  • Coracoid bone is a paired bone. 
  • Coracoid bones are present in the shoulders.
• Arytenoid 
  • The arytenoid cartilages are a pair of pyramid-shaped cartilage structures present in the larynx (voice box).
  • It is attached to the vocal cords.
• Atlas
  • Atlas is found in the vertebral column (present in backbone).
  • Atlas is the first vertebra and it articulates with the occipital condyles of the skull.

Thus, Pterygoid bone is related with skull.