This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anaesthesia, Subject name: Anaesthesia
Intravenous anaesthetics are all except. 
Select and explain. 
A. Propofol, B. Opioids, C. Ketamine, D. Desflurane
D: Desflurane
Answer: D: Desflurane 
Explanation: Intravenous anesthetics are barbiturates - Thiopentone sodium, methohexitone Non-Barbiturates - Propofol, Ketamine, Etomidate, Opioids. Inhalational anesthetics are halothane, isoflurane, desflurane, sevoflurane.