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
[{'content': 'Which of the following drug is a hallucinogen:September 2011 \nSelect and explain. \nA. Quinidine, B. Disulfiram, C. Cocaine, D. Steroids', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: CocaineThe complications of chronic cocaine use include acute anxiety reaction, uncontrolled compulsive behaviour, psychotic episodes (with persecutory delusions, and tactile and other hallucinations), delirium and delusional disorder. Hallucination:It is a disorder of perception (false perception without external stimulus)It is viewed as sensory perceptions and occurs in inner subjective spaceNot dependent on the will of the observerFormed visual hallucinations are seen in: Temporal lobe lesion', 'role': 'assistant'}]