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 of the following is only vascular disease with panarteritis where internal elastic lamina is preserved \nSelect and explain. \nA. Buerger's disease, B. Takayasu arteritis, C. Raynaud's disease, D. Churg Strauss syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: Buerger's disease is only panarteritis where internal elastic lamina is preserved.", 'role': 'assistant'}]