This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Characterstic features of opioid withdrawal is: \nSelect and explain. \nA. Rhinorrhea and lacrimation, B. Seizures, C. Delirium Tremors, D. Transient visual, tactile or auditory hallucinations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Opiod withdrawal symptoms are lacrimation,sweating, yawning, anxiety, apprehension, restlessness, rhinorrhoea and tremors seen 8-12 hours after the last dose. Ref KD Tripathi 8th ed.', 'role': 'assistant'}]