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: Pharmacology
[{'content': 'Following accidental intra–arterial injection of thiopentone, which should not be done? \nSelect and explain. \nA. Remove the needle, B. Intra–arterial heparin, C. Intra–arterial papaverine, D. Do a stellate ganglion block', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Treatment of accidental intra-arterial injection of thiopentone is:\n\nImmediately stop the further injection.\nLeave the needle at the site.\nInject heparin through this needle.\nInject papaverine through this needle.\nIf vasodilators like papaverine are not available, xylocaine can be used.\nBrachial plexus or stellate ganglion block should be done to relieve vasospasm.', 'role': 'assistant'}]