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: Pharmacology
[{'content': 'Which IV anesthetic not cause cardiac depression? \nSelect and explain. \nA. Etomidate, B. Propofol, C. Methohexital, D. Thiopentone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Etomidate:- Preferred inducing agent in cardiovascular surgery Major disadvantage is adrenal suppression Thiopental:- Ultrasho acting barbiturate with high lipid solubility. Potent anaesthetic but weak analgesic. Methohexital & Thiopental - Histamine release', 'role': 'assistant'}]