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': 'Sclerotherapy is contraindicated in all except \nSelect and explain. \nA. Deep vein thrombosis, B. Saphenofemoral incompetance, C. Recurrent varies, D. Huge varicosities', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Recurrent varies is not a contraindication for sclerotherapy.', 'role': 'assistant'}]