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: Pathology
[{'content': 'Poly arteritis nodosa does not involve \nSelect and explain. \nA. Pulmonary artery, B. Bronchial artery, C. Renal artery, D. Cerebral artery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Polyarteritis nodosa (PAN) is a systemic vasculitis of small or medium sized muscular arteries, typically involving renal and visceral vessels but sparing the pulmonary circulation.\xa0 \xa0 \xa0\xa0\nP\xa0\xa0A\xa0\xa0N -----\n* Pulmonary\xa0\xa0artery\xa0not involved.\n*P ANCA -negative', 'role': 'assistant'}]