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
Ascending aoa involvement is the commonest site of which aneuryam - 
Select and explain. 
A. Syphilitic, B. Atherosclerotic, C. Mycotic, D. None of the above
A: Syphilitic
Answer: A: Syphilitic 
Explanation: Ans. is 'a' i.e., Syphilitic