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
Which of the following is the most common feature of Aortitis on chest X-ray – 
Select and explain. 
A. Calcification of ascending aorta, B. Calcification of descending aorta, C. Calcification of pulmonary artery, D. Focal oligemia
A: Calcification of ascending aorta
Answer: A: Calcification of ascending aorta 
Explanation: The ascending aorta is a common site for calcification in aortitis, especially in syphilitic aortitis.