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: Pharmacology
Which of the following does not cause postural hypotension: 
Select and explain. 
A. Prazosin, B. Phentolamine, C. Levodopa, D. ACE inhibitor
D: ACE inhibitor
Answer: D: ACE inhibitor 
Explanation: None