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': 'Which is true regarding Trendelenburg operation ? \nSelect and explain. \nA. Sripping of the superficial varicose vein, B. Flush ligation of the superficial varicose vein, C. Ligation of the perforators, D. Ligation of small tributaries at the distal end of superficial varicose vein', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is 'b' i.e. Flush ligation of the superficial varicose vein Sapheno-femoral Ligation - is called Trendelenburg's procedure.", 'role': 'assistant'}]