<prompt> The nasopharynx is lined by which epitheliumStratified squamous non-keratinizedCiliated columnarStratified squamous keratinizedCuboidal  <response>: The pharyngeal wall consists of 4 layers from within outwards 1. Mucous membrane: Epithelium is ciliated columnar in the nasopharynx and stratified squamous elsewhere.2. Pharyngeal aponeurosis pharyngobasilar fascia.3. Muscular coat: 2 layersExternal layer :- superior, middle, and inferior constrictors.Internal layer :- stylopharyngeus, salpingopharyngeus and palatopharyngeus muscle.4. Buccopharyngeal fascia. 