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: Surgery
[{'content': 'Bile duct injury is detected after 72 hours of surgery. What is the  treatment option \nSelect and explain. \nA. Ercp and stent, B. CBD exploration, C. PTC, D. Observation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]