This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance abuse, Subject name: Psychiatry
[{'content': '"Chasing the dragon" phenomena occurs with \nSelect and explain. \nA. Opioids, B. LSD, C. Cocaine, D. Amphetamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "Chasing the dragon" refers to inhaling the vapour from a heated solution of morphine, heroin. The "chasing" occurs as the user gingerly keeps the liquid moving in order to keep it from overheating and burning up too quickly, on a heat conducting material such as aluminium foil. The moving smoke is chased after with a tube through which the user inhales. Reference: Kaplon and sadock, 11 th edition, synopsis of psychiatry, 11 th edition, pg no. 659', 'role': 'assistant'}]