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': 'Injection sclerotherapy for varicose veins is by using \nSelect and explain. \nA. Phenol, B. Absolute alcohol, C. 70% alcohol, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Phenol Sclerosing agents mentioned in the latest editions of Schwaz, CSDT and Bailey are:- hypeonic saline,- sodium tetradecyl sulfate, and- polidocanol2 other sclerosants are mentioned in KDT 6/e p597- Ethanolamine oleate- Phenol in almond oil or Peanut oil', 'role': 'assistant'}]