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: Pathology
[{'content': 'Luetic aneurysms are common in all except - \nSelect and explain. \nA. Ascending aorta, B. Arch of aorta, C. Descending thoracic aorta, D. Abdominal aorta', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]