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: Unknown
[{'content': 'Which substance, if used for a long time is associated with memory loss? \nSelect and explain. \nA. Marijuana, B. Alcohol, C. Cocaine, D. LSD', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Alcohol amnestic disorder (Korsakoff syndrome) is the result of long-term alcohol abuse.', 'role': 'assistant'}]