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: Radiology
[{'content': 'Which of the following is viually diagnostic of aoitis on chest X-Ray? \nSelect and explain. \nA. Calcification in descending aoa, B. Calcification of ascending aoa, C. Calcification of pulmonary aery, D. Focal oligemia', 'role': 'user'}, {'content': "Answer: B \nExplanation: B i.e. Calcification of ascending aoa - Saccular aneurysm with pencil - thin (linear) dystrophic calcification most commonly in ascending aoa commencing near the aoic rootQ is charcteristic feature of syphilitic aoitis. - Aoic aneurysm in Marfan's syndrome often involves sinuses of valsalva, & ascending aoa. It can also affect aoic ring resulting in AR. The aneurysm is classically flask shaped with loss of usual indentation at sino -tubular junction. Takayasu's aoitis affects segments of aoa including main aoic branches & pulmonary aeries.", 'role': 'assistant'}]