This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitic Disorders in Children, Subject name: Pediatrics
[{'content': "Which is not a characteristic of Wegener's granulomatosis: \nSelect and explain. \nA. Granuloma in vessel wall, B. Focal necrotising glomerulonephritis, C. Positive for cANCA, D. Involves large vessels", 'role': 'user'}, {'content': "Answer: D \nExplanation: Wegener's granulomatosis involves small vessels", 'role': 'assistant'}]