General Medicine General 3d1cee06 A chest physician performs bronchoscopy in the procedure room of the outpatient depament. To make the instrument safe for use in the next patient waiting outside, the most appropriate method of disinfection is by: A 70% alcohol for 5 min B 2% glutaraldehyde for 20 min C 2% formaldehyde for 10 min D 1% sodium hypochlorite for 15 min