<prompt> Narrowest part in infants respiratory tract is:SubglottisGlottisCarinaNone of these  <response>: a SubglottisRef. Scott Brown, 8th ed., Voll; 326In infants larynx the diameter of cricoid cartilage is smaller than the glottis, making subglottis the narrowest part, whereas in adults the narrowest part is the glottis. 