This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Which is a pneumatic bones:March 2012 
Select and explain. 
A. Clavicle, B. Maxilla, C. Humerus, D. Femur
B: Maxilla
Answer: B: Maxilla 
Explanation: Ans: B i.e. MaxillaCeain irregular bone contains large air spaces lined by epithelium. Examples: maxilla, sphenoid, ethmoid etc.