This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'The following are lined with pseudostratified ciliated columnar epithelium except? \nSelect and explain. \nA. Nasal cavity, B. Paranasal air sinuses, C. Vocal cords, D. Trachea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Vocal cords, due to constant friction, are lined with stratified squamous non-keratinized epithelium Pseudostratified ciliated columnar epithelium in the upper respiratory tract and trachea Non-ciliated pseudostratified columnar epithelia are located in the membranous pa of vas deferens Reference: Chaurasia; 6th edition.', 'role': 'assistant'}]