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': 'Warm antibody in autoimmune hemolytic anemia \nSelect and explain. \nA. IgM, B. IgG, C. IgE, D. IgA', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Warm antibody is\xa0IgG.', 'role': 'assistant'}]