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: Microbiology
[{'content': 'Hemagglutinin (AntiA and Anti B) are which type of antibodies - \nSelect and explain. \nA. IgG, B. Ig M, C. IgA, D. IgE', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., IgM", 'role': 'assistant'}]