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': 'Allergic hypersensitivity is mediated by ? \nSelect and explain. \nA. IgM, B. IgG, C. IgD, D. IgE', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., IgE", 'role': 'assistant'}]