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
Which of the following drugs should not be used in a setting of severe hypertension in elderly on empirical basis ? 
Select and explain. 
A. Enalapril, B. Amlodipine, C. Chlorthiazide, D. Prazosin
D: Prazosin
Answer: D: Prazosin 
Explanation: None