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': "Trosier's sign is - \nSelect and explain. \nA. Rt. supraclavicular lymph node enlargment, B. Lt. supraclavicular Lymphnode enlargement, C. Carpopedal spasm, D. Migrating Thrombophlebitis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]