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': 'Which is not a characteristic of wegeners granulomatosis - \nSelect and explain. \nA. Granuloma in vessel wall, B. Focal necrotising glomerulonephritis, C. Positive for c ANCA, D. Involves large vessels', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Wegeners granulomatosis involves small vessels (arteriole, venule, capillary).', 'role': 'assistant'}]