This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adverse Drug Effect, Subject name: Pharmacology
[{'content': 'Pain is caused by injection of \nSelect and explain. \nA. Ketamine, B. Methohexitone, C. Di-isopropyl alcohol, D. Thiopentone', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Thiopentone Thiopentone is an ultrashort acting Barbiturate.It is usually given intravenously to achieve rapid induction of anaesthesia.Inadvertent intra-arterial injection or extravasation of Thiopentone leads to thrombosis and necrosis. This produces intense pain.", 'role': 'assistant'}]