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: Surgery
[{'content': 'During esophagoscopy, the area in the esophagus mostly perforated is- \nSelect and explain. \nA. At aortic arch, B. Mid esophagus, C. At cricopharyngeus muscle, D. At esophagogastric junction', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • Esophageal instrumentation accounts for the large majority of iatrogenic perforations, with the cricopharyngeal area most commonly injured', 'role': 'assistant'}]