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': 'Virchow node is involvement of \nSelect and explain. \nA. Left supraclavicular, B. Left subclavicular, C. Right supraclavicular, D. Left periumblical', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Left supraclavicular nodes', 'role': 'assistant'}]