This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
[{'content': 'All are Pneumatic bones except: \nSelect and explain. \nA. Sphenoid, B. Ethmoid, C. Parietal, D. Frontal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. ParietalPneumatic bones are those bones which contain an air filled cavity within them. In humans, they are seen in relation to the nasal cavity - they enclose the paranasal sinuses. Pneumatic bones are - maxilla, frontal bone, sphenoid and ethmoid', 'role': 'assistant'}]