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': 'RBC cast in the microscopic examination of the urine is an indicator of - \nSelect and explain. \nA. Acute glomerulonephritis, B. Acute Pyelonephritis, C. Chronic glomerulonephritis, D. Nephrotic syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]