This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
[{'content': 'Formication and delusion of persecution, both are together seen in - \nSelect and explain. \nA. LSD psychosis, B. Amphetamine psychosis, C. Cocaine psychosis, D. Cannabis psychosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: cocaine causes * Psychosis * Auditory or visual hallucinations * Altered tactile sensation: the person feel that some small insects are crawling on his skin. This is known as Magnan's symptom or cocaine bugs (formication). REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 347", 'role': 'assistant'}]