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: Unknown
[{'content': 'Palpable purpura is caused by - \nSelect and explain. \nA. HSP, B. PAN, C. Microscopic polyangitis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans-DCauses of palpable purpuraRocky mountain spotted feverAcute meningococcemiaDisseminated gonococcal infectionEcthyma gangrenosumHenoch Schonlein purpuraPolyarteritis nodosaLeucocytoclastic vasculitis', 'role': 'assistant'}]