This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anaesthesia, Subject name: Anaesthesia
[{'content': 'IV administration of which drug is most painful among the following \nSelect and explain. \nA. Methohexitol, B. Propofol, C. Etomidate, D. Ketamine', 'role': 'user'}, {'content': "Answer: B \nExplanation: * Pain on injection is the most commonly repoed adverse event during propofol administration. Not seen with etomidate due to use of etomidate in lipid emulsion vehicle. Ref:- Stoelting's Pharmacology and Physiology in Anesthetic Practice 5th edition Pg num:- 168,170", 'role': 'assistant'}]