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 extra-cranial complication of ASOM is - \nSelect and explain. \nA. Facial nerve paralysis, B. Lateral sinus thrombosis, C. Mastoiditis, D. Brain abscess', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]