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': "Recurrent gross hematuria is seen in- \nSelect and explain. \nA. Alports's syndrome, B. IgA nephropathy, C. Focal seg. GN, D. DM", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]