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: Anatomy
[{'content': 'In polyaeritis nodosa lesions are seen in all except \nSelect and explain. \nA. Lung, B. Pancreas, C. Liver, D. Hea', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer robbins 9/e 511 Polyaeritis nodosa typically involving necrotizing inflammation typically involving renal aeries sparing pulmonary vessels', 'role': 'assistant'}]