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': 'All of the following are indications for surgery in a case of duodenal ulcer EXCEPT - \nSelect and explain. \nA. Acute perforation of ulcer, B. Pyloric stenosis, C. Massive haemorrhage, D. Typical periodicity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]