This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephrotic and Nephritic syndrome, Subject name: Medicine
[{'content': 'Which is a characteristic finding in AGN? \nSelect and explain. \nA. Red blood cell cast, B. Hematuria, C. Proteinuria, D. Epithelial Cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * RBC casts indicate glomerular bleeding and are seen with acute glomerulonephritis. * Hematuria can be seen with even kidney stones or bladder cancer and hence is not a characteristic finding of AGN.', 'role': 'assistant'}]