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': 'Risk factor for development of gastric Ca : \nSelect and explain. \nA. Blood group O, B. Duodenal ulcer, C. Intestinal hyperplasia, D. Intestinal metaplasia type III', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]