This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plasma Cell Disorders and Multiple myeloma, Subject name: Pathology
[{'content': 'Which amongst the following is the most common form of plasma cell dyscrasia? \nSelect and explain. \nA. Solitary myeloma (Plasmacytoma), B. Monoclonal Gammopathy of Unceain Significance (MGUS), C. Multiple myeloma, D. Lymphoplasmacytic lymphoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Most common form of plasma cell dyscrasia -Monoclonal Gammopathy of Unceain Significance (MGUS) -Plasma cell dyscrasia with 'M' spike or Monoclonal spike caused because of IgM -Macroglobulinemia/ WALDERNSTROM'S DISEASE AKA Lymphoplasmacytic Lymphoma. Plasma cell dyscrasia - POEMS SYNDROME P - Polyneuropathy O - Organomegaly E - Endocrinopathy M - Monoclonal gammopathy S - Skin changes", 'role': 'assistant'}]