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: Pediatrics
[{'content': "A 5–year old child presents with perivascular IgA deposition and neutrophil collection. There is erythematous rash on the lower limb and non-blanching purpura. Probable diagnosis is – \nSelect and explain. \nA. Henoch–Schonlein purpura, B. Wegener's granulomatosis, C. Vasculitis, D. Kawasaki's disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]