This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
[{'content': "ANCA is NOT associated with which of the following disease - \nSelect and explain. \nA. Wegener's granulamatosis, B. Henoch schonlein purpura, C. Microscopic PAN, D. Churg Strauss syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref - Researchgate.net', 'role': 'assistant'}]