This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc. (W.B.C), Subject name: Pathology
[{'content': 'Which of the following is not a minor diagnostic criteria for multiple myeloma? \nSelect and explain. \nA. Lytic bone lesions, B. Plasmacytosis greater than 20%, C. Plasmacytoma on biopsy, D. Monoclonal globulin spike on serum electrophoresis of > 2.5 g/dl for IgG, >1.5 g/dl for IgA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Plasmacytoma on biopsy(Ref: Wintrobes 12th/pg2377)Durie and Salmon criteria for diagnosis of Multiple myeloma.A minimum of 1 major and 1 minor criterion needed, although (1) + (a) is not sufficient, or 3 minor criteria that must include (a) and (b).However, International myeloma working group 2011 has revised the criteria as mentioned in pretexts.', 'role': 'assistant'}]