This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology of Head and Neck, Subject name: Anatomy
[{'content': 'All of the following are pneumatic bone EXCEPT: \nSelect and explain. \nA. Maxilla, B. Frontal, C. Mandible, D. Ethmoid', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) MandibleRef: Gray's 38th ed./431* Pneumatic Bone: Some cranial bones have air filled cavities for making skull light weight, resonance of voice & air conditioning.* Maxilla, Mastoid, Ethmoid, Sphenoid & Frontal bones are pneumatic bones.Types of boneSesamoid bonesPneumatic bone (Mn: It has Maximum Spherical Front Mass)Membranous (Dermal) bone* Patella* Pisiform* Fabella* Ethmoid* Maxilla* Sphenoid* Frontal* Mastoid (temporal)* Skull vault bones* Facial bones", 'role': 'assistant'}]