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': 'Bisgard treatment is for - \nSelect and explain. \nA. Aerial ulcer, B. Venous ulcer, C. TAO, D. Raynauds phenomenon', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Venous ulcer", 'role': 'assistant'}]