This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous General Anesthesia, Subject name: Anaesthesia
Dissociative anaesthesia is produced by - 
Select and explain. 
A. Ketamine, B. Etomidate, C. Propofol, D. Thiopentone
A: Ketamine
Answer: A: Ketamine 
Explanation: Ans. is 'a' i.e., Ketamine o Dissociative anaesthesia is characterized by profound analgesia, immobility, amnesia with light sleep and feeling of dissociation from once own body and the surroundings Cataleptic state,o Ketamine (phencyclidine) induces dissociative anaesthesia.