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
Which of the following drugs produces dissociative anaesthesia: March 2013 (g) 
Select and explain. 
A. Ketamine, B. Propofol, C. Thiopentone, D. Enflurane
A: Ketamine
Answer: A: Ketamine 
Explanation: Ans. A i.e. Ketamine Ketamine Is a phencyclidine, Causes dissociative anaesthesia, Causes - Hallucination, - Delusion and - Illusion Causes profound analgesia Increases all pressures: - Intracranial Tension, - Intraocular pressure, - BP C/I in: Intracerebral mass/hemorrhage etc