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': 'Predisposing factors for stomach carcinoma ? \nSelect and explain. \nA. Gastric ulcer, B. Pernicious anemia & achlorhydria, C. Hiatus hernia, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer 'b' i.e. Pernicious anemia & achlorhydria", 'role': 'assistant'}]