This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Which of the following drugs should not be used in setting FCB hypeension in elderly in empirical basis \nSelect and explain. \nA. Enalapril, B. Amilodipine, C. Chlohiazide, D. Prazosin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Refer CMDT 2010/409 Prazosin should be avoided as a first line choice due to risk of postural hypeension', 'role': 'assistant'}]