<prompt> Commonly used route of administration for general anaesthesia isInhalationalIntravenousIntra-arterialSubcutaneous  <response>: This question is a bit confusing one because of the following two facts :-For the induction of anaesthesia, intravenous anaesthetics are used mostly.For the maintenance of anaesthesia, inhalational agents are used most commonly.But following statement will clear the doubts.Now a day, most of the minor surgical procedures like incision drainage are done in total intravenous anaesthesia in which intravenous anaesthetics are used for both induction as well as maintenance of anaesthesia.So,For major surgical procedure i Induction by intravenous anaesthesia, and ii Maintenance by inhalational anaesthesia.For minor surgical procedure Induction and maintenance both by intravenous anaesthesia. 