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: Pathology
[{'content': 'Plasrnacytoid lymphomas may be associated with - \nSelect and explain. \nA. IgG, B. IgM, C. IgA, D. IgE', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Plasmacytoid lymphoma is lymphoplasmacytic lymphoma.Its a B cell neoplasm in adults.Most commonly the plasma cell component secretes monoclonal IgM,often in amount sufficient to cause a hyperviscosity syndrome, Waldenstrom macroglobulinemia Ref:Robbins and Cotran Pathologic basis of disease.South Asia Edition-9; volume 1.page no.598,601', 'role': 'assistant'}]