Which of the following intravenous anaesthetic agent causes decrease in postoperative nausea and vomiting :

Anaesthesia

Which of the following intravenous anaesthetic agent causes decrease in postoperative nausea and vomiting :

Allergy in immediate perioperative period is due to:

All of the following are true about lumbar puncture except:

Which of these is most commonly used as pre-anesthetic medication?