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': 'Urine analysis of patient associated with hematuria and glomerulonephrosis shows: \nSelect and explain. \nA. Isomorphic red cell, B. Red cell cast, C. WBC cast, D. Hyaline cast', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]