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: Pathology
[{'content': 'Which one of the following is the most common immunologic type of multiple myeloma? \nSelect and explain. \nA. IgG; Kappa light chain, B. IgA, Kappa light chain, C. IgD, Lambda light chain, D. IgM, type', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]