This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Which among the following is characteristic of a/c glomerulonephritis: Need to change the format? \nSelect and explain. \nA. Muddy brown Cast, B. FeNa < 1%, C. Haematuria Proteinuria, D. WBC', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ref: Harrison's 18/e p2300", 'role': 'assistant'}]