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': 'Young adult normotensive patient with painless gross hematuria, most likely diagnosis - \nSelect and explain. \nA. Minimal change disease, B. IgA nephropathy, C. Cresentic GN, D. Membrano proliferative', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]