This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
[{'content': 'Which of the following substances is associated with flashback phenomenon? \nSelect and explain. \nA. Cannabis, B. LSD, C. Psilocybin, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cannabis and hallucinogens can cause Flash back phenomenon Flash back phenomenon: Re-experience of the sensations associated with use in the absence of the drug even months after the last dose', 'role': 'assistant'}]