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': 'Extrahepatic cholestasis is associated with: \nSelect and explain. \nA. T bilirubin in urine, B. T urobilirubin in urine, C. T bilirubin and T urobilirubin in serum, D. T bilirubin in serum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]