This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Pharyngeal tonsil is lined by? \nSelect and explain. \nA. Simple cuboidal epithelium, B. Pseudostratified columnar epithelium, C. Keratinizing stratefied squamous epithelium, D. Nonkeratinizing stratefied squamous epithelium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]