At the end of anaesthesia after discontinuation of nitrous oxide and removal of endotracheal tube, 1000/0 oxygen is administered to the patient to prevent:

Anaesthesia

At the end of anaesthesia after discontinuation of nitrous oxide and removal of endotracheal tube, 1000/0 oxygen is administered to the patient to prevent:

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?