<prompt> Operation theatre sterilisation is done bysavlon cleansingCarbolic acid sprayUltra violet raditionAutoclave  <response>: UV rays are used to disinfect OT for 30-45 min exposure Formaldehyde gas also can be used for fumigation of operation theatres. Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 33 