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: Anaesthesia
Fluoride content is least: 
Select and explain. 
A. Methoxyflurane, B. Enflurane, C. Isoflurane, D. Sevoflurane
C: Isoflurane
Answer: C: Isoflurane 
Explanation: C i.e. Isoflurane Isoflurane has least & methoxyflurane has highest fluride contentQ. Methoxyflurane causes vasopressin resistant high output renal failure.Q.