Which of the following is the preferred intravenous agent of induction of anesthesia

Which of the following is the preferred intravenous agent of
induction of anesthesia for maintaining spontaneous breathing and airway
tone?
A. Midazolam
B. Propofol
C. Ketamine
D. Diazepam
Dr Yugal chandrakar(DY)
MD Anaesthesia

Ans is C ketamine

Propofl medaz diazepam all may couse respiratory depression