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
All of the following drugs are useful in treatment of
hypertension except 
Select and explain. 
A. Ephedrine, B. Reserpine, C. Methyldopa, D. Thiazole diuretics
A: Ephedrine
Answer: A: Ephedrine 
Explanation: None