<prompt> In direct laryngoscopy which of the following cannot be visualized:CricothyroidLingual surface of epiglottisArytenoidsPyriform fossa  <response>: a CricothyroidRef. Dhingra, 6th ed., 422In Direct laryngoscopy we are visualising the cavity of the larynx from within so cricothyroid muscle or membrane which lie externally cannot be seen. 