This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'The following ADR is seen with withdrawal of \nSelect and explain. \nA. Strychnine, B. Clonidine, C. Morphine, D. Baclofen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The picture shows piloerection which occurs due to sympathetic stimulation which is typically seen with opioid withdrawalRef: Goodman Gillman 12th ed pg 660', 'role': 'assistant'}]