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: Skin
[{'content': "IgA deposits on skin biopsy \nSelect and explain. \nA. Henoch Schouleiln puspura, B. Giant cell aeritis, C. Microscopic polyangitis, D. Wegener's granulomatosis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A.i.e. Henosch Schonlein purpura', 'role': 'assistant'}]