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Which of the following is the most appropriate type of airway for use with a semiconscious pa-tient for whom intubation with an endotracheal tube is unsuccessful?

a. Berman airway c. Laryngeal mask airway b. Tracheostomy tube d. Nasopharyngeal airway

Recorded detail is

a. the degree of geometric sharpness. b. definition. c. the accuracy of the structural lines actually recorded in the radiographic image. d. all of the above