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: Pharmacology
A patient with mitral stenosis had to undergo surgery. A pre-anaesthetic checkup revealed the increased liver enzymes. Which of the following inhalational agent should be preferred in this patient? 
Select and explain. 
A. Xenon, B. Enflurane, C. Halothane, D. Sevoflurane
A: Xenon
Answer: A: Xenon 
Explanation: Halothane is hepatotoxic and all fluorinated anesthetic agents can cause a dose-dependent decrease in arterial BP and de­pression of heart. Xenon has minimal effect on CVS function.