During surgery for aortic arch aneurysm under deep hypothermic circulatory arrest which of the following anaesthetic agent administered prior to circulatory arrest that also provides cerebral protection?

Anaesthesia

During surgery for aortic arch aneurysm under deep hypothermic circulatory arrest which of the following anaesthetic agent administered prior to circulatory arrest that also provides cerebral protection?

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?