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
Agents recommended in treatment  of aortic dissection are all except 
Select and explain. 
A. Beta blockers, B. Labetolol, C. Sodium nitoprusside, D. Diazoxide
D: Diazoxide
Answer: D: Diazoxide 
Explanation: Diazoxide is vasodilator ,which can aggravate dissection, so containdicated in aortic dissection.