This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aerial disorders, Subject name: Surgery
[{'content': 'All of the following are risk factors for thoracic aoic aneurysm (TAA) rupture except: \nSelect and explain. \nA. Symptomatic aneurysm, B. Concurrent dissection, C. Increased patient age, D. Anticoagulation use', 'role': 'user'}, {'content': 'Answer: D \nExplanation: TAAs are those occurring distal to the left subclan vein. The risk for rupture is increased with : Increasing aneurysm size Advanced age History of chronic obstructive pulmonary disease (COPD) Concurrent dissection. Anticoagulation is not a risk factor for rupture.', 'role': 'assistant'}]