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
Characterstic CVS leison in syphils is - 
Select and explain. 
A. Aneurysm of arch of aoa, B. Aoic ring dilatation, C. Medial necrosis, D. All
B: Aoic ring dilatation
Answer: B: Aoic ring dilatation 
Explanation: Ans. is 'b' i.e., Aoic ring dilatation Syphilitic aoitis usually affects the proximal ascending aoa, paicularly the aoic root, resulting in aoic dilatation and aneurism formation.