This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joints, Subject name: Anatomy
All of the following bones are pneumatic except: 
Select and explain. 
A. Maxilla, B. Frontal, C. Mandible, D. Ethmoid
C: Mandible
Answer: C: Mandible 
Explanation: Ans. C. MandiblePneumatic 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.