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: Medicine
[{'content': 'H.Pylori causes which of the following anemia \nSelect and explain. \nA. Iron deficiency anemia, B. Sideroblastic anemia, C. Hemolytic anemia, D. Aplastic anemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]