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
"Chasing the dragon" is a slang used with 
Select and explain. 
A. Cocaine, B. Heroin, C. LSD, D. Ketamine
B: Heroin
Answer: B: Heroin 
Explanation: "Chasing the dragon" refers to inhalation of vapours of Heroin (opioid) placed on a heated aluminium foil.