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': ". The most commonly practiced operative procedure for a perforated duodenal ulcer is - \nSelect and explain. \nA. Vagotomy and pyloroplasty, B. Vagotomy and antrectomy, C. Vagotomy and perforation closure, D. Graham's omentum patch repair", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]