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: Medicine
[{'content': 'Which immunoglobulin combination is predominantly in pathogenesis of cryglobulinemic vasculitis \nSelect and explain. \nA. IgA + IgG, B. IgM + IgG, C. IgA + IgE, D. IgE + IgM', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. IgM + IgGcryoglobulinemic vasculitis occurs when an aberrant immune response to hepatitis C infection leads to the formation of immune complexes consisting of hepatitis C antigens,polyclonal hepatitis C-specific IgG, and monoclonal IgM rheumatoid factor.', 'role': 'assistant'}]