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': 'Acute opioid withdrawl is characterizedby \nSelect and explain. \nA. Rhinorrhoea, B. Piloerection, C. Insomnia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A, B, C i.e. Rhinorrhoea, Piloerection, Insomnia', 'role': 'assistant'}]