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 8-year-old male had non-blanching rashes over the shin and swelling of the knee joint with haematuria +++ and protein +. Microscopic analysis of his renal biopsy specimen is most likely to show – \nSelect and explain. \nA. Tubular necrosis, B. Visceral podocyte fusion, C. Mesangial deposits of IgA, D. Basement membrane thickening', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This child has →\n\ni) Rash\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\nii) Arthritis (swelling of knee joint)\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\niii) Haematuria\n\nAll these suggest the diagnosis of Henoch Schonlein purpura\nHSP is characterized by deposition of IgA in the mesangium.', 'role': 'assistant'}]