This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': 'In lymphoplasmacytoid lymphoma which of the following monoclonal immunoglobulin is seen ? \nSelect and explain. \nA. IgA, B. IgD, C. IgG, D. IgM', 'role': 'user'}, {'content': "Answer: D \nExplanation: Waldenstrom macroglobulinaemia is a low grade lymphoplasmacytoid lymphoma associated with an Ig M paraprotein causing clinical features of hyperviscosity syndrome.Reference:Davidson's principles & practice of medicine 22nd edition pg no 1045", 'role': 'assistant'}]