This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Anaesthesia
[{'content': 'Intravenous agent does not causes pain:- \nSelect and explain. \nA. Methohexetal, B. Propofol, C. Ketamine, D. Etomidate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: IV anesthetic causing pain - Oxybarbiturate - Methohexitone- Propofol- Etomidate Among neuro muscular blockers- IV Rocuronium (pain on injection)', 'role': 'assistant'}]