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: Psychiatry
Which of the following is a stimulant 
Select and explain. 
A. Alcohol, B. Nicotine, C. Cannabis, D. Cocaine
D: Cocaine
Answer: D: Cocaine 
Explanation: Cocaine and amphetamine are included under stimulant group of drugs.