This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
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: palpable purpura is due to deposition of immune complexes at the site, seen in HSP,Ahritis, gut vasculitis,glomerulonephritis, bacterial endocarditis, gonococcaemia,meningococcaemia and rocky mountain spotted fever. Page no.309. Reference IADVL's concise textbook of dermatology