This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'A 2-year-old child undergoes tympanostomy tube placement for treatment of chronic bilateral serous otitis media. Which of the following complications is least likely to occur subsequent to surgery? \nSelect and explain. \nA. Chronic perforation, B. Cholesteatoma, C. Tympanosclerosis, D. Scarring of the external auditory canal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tympanostomy tube placement is performed through the external auditory canal with microscopic guidance.The chance of external auditory canal to be scarred is very less. The tympanic membrane is directly visualized after clearing wax and debris from external auditory canal. Otorrhea is the most common sequela, requiring', 'role': 'assistant'}]