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
Palpable purpura is caused by - 
Select and explain. 
A. HSP, B. PAN, C. Microscopic polyangitis, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans-DCauses of palpable purpuraRocky mountain spotted feverAcute meningococcemiaDisseminated gonococcal infectionEcthyma gangrenosumHenoch Schonlein purpuraPolyarteritis nodosaLeucocytoclastic vasculitis