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': 'Symptomatic treatment is not required in withdrawal of \nSelect and explain. \nA. Cannabis, B. Morphine, C. Alcohol, D. Cocaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Cannabis', 'role': 'assistant'}]