<prompt> Which of the following items in the dental operatory cannot be classified as a semi-critical item:Suction tipHandpieceEndodontic fileWater syringe tip  <response>: CriticalNon Critical instrument:Critical: Contactpenetratecut tissues e.g. endodontic file, scalpelSemi Critical: Which touch mucosa BUT donot cutpenetrate tissue e.g. airwater syringe tip, suction tip, handpieceNon-Critical: Surface disinfection is adequate e.g. X-ray stand, light source 