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
The only non–catecholamine sympathomimetic drug out of the following is: 
Select and explain. 
A. Adrenaline, B. Ephedrine, C. Dopamine, D. Isoprenaline
B: Ephedrine
Answer: B: Ephedrine 
Explanation: None