This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': "ANCA associated with Wegner's granulomatosis? \nSelect and explain. \nA. cANCA, B. pANCA, C. Both, D. None", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Wegener granulomatosis is a necrotising vasculitis characterised by specific triad . Granuloma of the lung or the upper respiratory tract . Vasculitis of small to medium sized vessel most prominently in the lungs and upper respiratory tract . Glomerulonephritis Initiated by cell mediated hypersensitivity response PR3-ANCAs are present in 95 percent of cases and probably drive the subsequent tissue injury Robbins 9 th edition page no. 353', 'role': 'assistant'}]