This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Anaesthetic agent causing analgesia 
Select and explain. 
A. Ketamine, B. Propofol, C. Etomidate, D. Thiopentone
A: Ketamine
Answer: A: Ketamine 
Explanation: "Ketamine is different from most other anaesthetic induction agents inthat it has significant analgesic action"(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.294)