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: Medicine
[{'content': "c-ANCA is characteristic for : \nSelect and explain. \nA. Polyaeritis Nodosa, B. R.P.G.N., C. Henoch's Schonlein Purpura, D. Wegeners granulomatosis", 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is D (Wegener's granulomatosis) : Antineutrophilic cytoplasmic antibody directed against cytoplasmic proteinase-3 (cANCA) is found in 90-95% if patients with Wegener's granulomatosis.", 'role': 'assistant'}]