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': 'When an antigen is administered for the first time to an animal or a human being who has never been exposed to it, the first antibody to develop- \nSelect and explain. \nA. IgG type, B. IgM type, C. IgA type, D. IgE type', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., IgM type", 'role': 'assistant'}]