This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitis, Subject name: Pathology
[{'content': 'ANCA negative vasculitis amongst the following is: \nSelect and explain. \nA. Wegner granulomatosis, B. Churg strauss syndrome, C. Polyaeritis nodosa, D. Microscopic polyangiitis', 'role': 'user'}, {'content': "Answer: C \nExplanation: ANCA 2 types P-ANCA |aka MPO ANCA C-ANCA | aka PR3 ANCA Associated with - Churg strauss Syndrome Microscopic Polyangiitis Associated with - Wegner's Granulomatosis Polyaeritis Nodosa is example of ANCA negative vasculitis. Polyaeritis nodosa is Type III Hypersensitivity reaction. It is the example of fibrinoid necrosis. It is associated with Hepatitis B infection.", 'role': 'assistant'}]