This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Renal lesions in Multiple myeloma - \nSelect and explain. \nA. Cast nephropathy, B. Amyloid deposition, C. Plasma cell infiltration, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e., Cast nephropathy; 'b' i.e., Amyloid deposition; 'c' i.e., Plasma cell infiltration", 'role': 'assistant'}]