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: Medicine
In Marfan's aortic aneurysm occurs in - 
Select and explain. 
A. Ascending aorta, B. Arch of aorta, C. Descending aorta, D. Abdominal aorta
A: Ascending aorta
Answer: A: Ascending aorta 
Explanation: None