This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inhalational Anesthetic Agents, Subject name: Anaesthesia
[{'content': 'Which of the following inhalational agent can cause coronary steal phenomenon- \nSelect and explain. \nA. Isoflurane, B. Sevoflurane, C. Desflurane, D. Halothane', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Isoflurane more than other inhalational agents increases coronary blood flow many times beyond that of the myocardial oxygen demand, thereby, creating potential for "Steel", steel is diversion of blood from a myocardial bed with limited or inadequate perfusion to a bed with more adequate perfusion.', 'role': 'assistant'}]