<prompt> 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:70 alcohol for 5 min2 glutaraldehyde for 20 min2 formaldehyde for 10 min1 sodium hypochlorite for 15 min  <response>: Techniques for Sterilization Steam Surgical instruments Ethylene Oxide Hea lung machine, respirators , dental labs Hot air oven Glass syringe, test tubes, flasks, cutting instruments Irradiation gamma rays Industrial packing Paraacetic acid STERIS Flexible endoscopes Isopropyl alcohol Clinical thermometer Beta propiolactone Formaldehyde Fumigation of OT, labs, wards 2 Glutaraldehyde Endoscope Cystoscope, Bronchoscope Autoclaving Culture media, suture materials except catgut Ref: Bailey 24th edition Pgno: 135 