This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'The most common site of perforation in tympanic membrane is \nSelect and explain. \nA. Antero inferior, B. Postero inferior, C. Postero superior, D. Antero superior', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Perforations. They may be central, attic or marginal and are associated with chronic otitis media The most common site of Tympanic membrane perforation is antero-inferior quadrant. Ref : Diseases of ENT by Dhingra 6th edition Pgno : 56,71', 'role': 'assistant'}]