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': 'Onion skin lesions, in the muscular layer of arteriole, are seen in - \nSelect and explain. \nA. SLE, B. Benign nephrosclerosis, C. Malignant nephrosclerosis, D. RPGN', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]