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': 'Commonest cause of death in peptic ulcer patients is - \nSelect and explain. \nA. Perforation, B. Hemorrhage, C. Pyloric stenosis, D. Maliganancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]