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: Surgery
Ascending aorta is involved in following types of dissecting aneurysm except 
Select and explain. 
A. Stanford - B, B. Stanford - A, C. DeBakey's - type I, D. DeBakey's - type II
A: Stanford - B
Answer: A: Stanford - B 
Explanation: In Stanford - B, only descending aorta is involved.