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: Unknown
[{'content': 'Most potent bronchodilator among inhalational anethestic agents is- \nSelect and explain. \nA. Isoflurane, B. Sevoflurane, C. Halothane, D. Desflurane', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Refer: Morgan and Mikhail’s Clinical Anaesthesiology, 5th edition, pg no. 167 – 169)\nEffect of inhalational agents on respiratory system\n\nAll inhalational agents are bronchodilators →Halothane cause maximum bronchodilatation.\xa0 Inhalational agent of choice in asthmatics (intravenous anaesthtic of choice is ketamine).\nAll inhalational agents cause respiratory depression to some extent → Maximum depression of respiration is seen with enflurane, on the other hand maximum inhibition of ventilator response to increased CO2 and hypoxia is caused by halothane\nAll inhalational agents vasodilate pulmonary vascular bed by blunting the hypoxic pulmonary vasoconstriction (HPV) response.\xa0 Halothane has maximum effect: Isoflurane, Enflurane, desflurane, sevoflurane have similar effect.', 'role': 'assistant'}]