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': 'Polyaeritis nodosa occurs in relation to which of the following \nSelect and explain. \nA. Hypeension, B. Trauma, C. Drugs, D. Bronchial asthma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer robbins 9/e p506 It is systemic vasculitis manifested by transmural necrotising inflammation of small and medium sized aeries Renal aery is most commonly involved whereas pulmonary circulation is spared Most common causes are fever of unknown cause, malice,weight loss, hypeension, abdominal pain,melena, diffuse muscular pains and peripheral neuritis', 'role': 'assistant'}]