<prompt> Pharyngeal tonsil is lined by?Simple cuboidal epitheliumPseudostratified columnar epitheliumKeratinizing stratefied squamous epitheliumNonkeratinizing stratefied squamous epithelium  <response>: On the posterior wall of pharynx is a prominence, best marked in childhood, produced by a mass of lymphoid tissue, which is known as the pharyngeal tonsil.The pharyngeal tonsil is a single tonsil situated in the superior-- posterior poion of the pharynx. It is covered by ciliated pseudostratified columnar epithelium. Ref: Anatomy of the Human Body Henry Gray. 