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': "Which of the following is not associated with ANCA? \nSelect and explain. \nA. Microscopic polyangitis, B. Churg strauss syndrome, C. Wegener's granulomatosis, D. Henoch shonlein purpura", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]