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: Forensic Medicine
[{'content': 'A patient has sensation of bugs crawling all over his body; this may be an effect of: \nSelect and explain. \nA. Cocaine, B. Alcohol, C. Cannabis, D. Benzodiazepines', 'role': 'user'}, {'content': "Answer: A \nExplanation: This patient is having sensation of 'cocaine bugs' crawling in his body which is the effect of chronic cocaine poisoning. Ref: Parikh's Textbook of Medical Jurisprudence Forensic Medicine and Toxicology, 5th Edition, Page 917 and 6th Edition, Page 119 ; The Essentials of Forensic Medicine and Toxicology By K.S. Narayana Reddy, 27th Edition, Page 536", 'role': 'assistant'}]