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': 'Most common Intra - cranial complication of chronic sinusitis \nSelect and explain. \nA. Brain abscess, B. Meningitis, C. Cavernous sinus thrombosis, D. Subdural abscess', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]