This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
Dissociative anesthesia is seen with which drug: 
Select and explain. 
A. Ketamine, B. Fentanyl, C. Propofol, D. Nitrous oxide
A: Ketamine
Answer: A: Ketamine 
Explanation: Ans. A. KetamineKetamine is NMDA receptor antagonist, they are strong analgesic with no muscle relaxant property. It is used to create dissociative anesthesia in which patient dissociate from one own body.