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
Non–synthetic alkaloid compound acting similar to amphetamine is: 
Select and explain. 
A. Caffeine, B. Cocaine, C. Nicotine, D. All of the above
B: Cocaine
Answer: B: Cocaine 
Explanation: None