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': 'True about immunoglobulins-( \nSelect and explain. \nA. IgE has maximum concentration, B. IgG has maximum concentration, C. IgA has minimum concentration, D. IgM has minimum concentration', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., IgG has maximum concentration . IgG has maximum serum concentration and IgE has minimum serum concentration.", 'role': 'assistant'}]