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: Medicine
[{'content': 'A 8 year old male had non blanching rashes over the shin and swelling of 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: None', 'role': 'assistant'}]