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: ENT
[{'content': 'Bone which is Pneumatic -a) Maxillaryb) Parietalc) Temporald) Frontale) Ethmoidal \nSelect and explain. \nA. bce, B. bde, C. ade, D. abde', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pneumatic bones are one which contain large air spaces lined by epithelium e.g.: maxilla, sphenoid, ethmoid, Frontal etc. They make the skull light in weight, help in resonance of voice, and act as air conditioning chambers for the inspired air.\nRemember\nMastoid is a spongy bone (cancellous or trabecular bone) and not pneumatic bone.', 'role': 'assistant'}]