This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Anaesthesia
Intravenous agent does not causes pain:- 
Select and explain. 
A. Methohexetal, B. Propofol, C. Ketamine, D. Etomidate
C: Ketamine
Answer: C: Ketamine 
Explanation: IV anesthetic causing pain - Oxybarbiturate - Methohexitone- Propofol- Etomidate Among neuro muscular blockers- IV Rocuronium (pain on injection)