This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Primary immune response is mediated by? \nSelect and explain. \nA. IgE, B. IgM, C. IgA, D. IgD', 'role': 'user'}, {'content': "Answer: B \nExplanation: The primary immune response is the antibody response to an initial antigen. It is mediated by IgM. With most antigens, IgG is a late antibody and makes it appear after initial immune response which is IgM in nature. Reference : Anathanarayan & paniker's 9th edition, pg no:97, 146 <\\p>", 'role': 'assistant'}]