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': 'Cholangiocarcinoma most commonly metastases to- \nSelect and explain. \nA. Liver, B. Bones, C. Lung, D. Pancrease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. LiverMost, patients present with abnormal liver function tests or frank jaundiceDiagnosis by ultrasound, MDR-CT or MRCP scanningMost common site of metastasis is liver.', 'role': 'assistant'}]