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
Smack is the "common" name for - 
Select and explain. 
A. Heroin, B. Cocaine, C. Opium, D. None
A: Heroin
Answer: A: Heroin 
Explanation: Smack is a street name for Heroin.