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': 'Intracellular accumulation of which of the following forms Russell bodies ? \nSelect and explain. \nA. Immunoglobulins, B. Cholesterol, C. Phospholipids, D. Lipoproteins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Intracellular accumulation of immunoglobulins that can occur in plasma cells or RER forms large rounded , eosinophilic Russell bodies. Multiple aggregates of Russell bodies forms Mott cells. Dutcher bodies- single and usually large pale staining nuclear inclusions that are common in IgA myeloma.', 'role': 'assistant'}]