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': 'The lacrimal duct open at the \nSelect and explain. \nA. Superior turbinate, B. Middle meatus, C. Inferior meatus, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: *Nasolacrimal duct is a membranous passage of 18mm long. *It begins at the lower end of lacrimal sac, runs downwards, backward and laterally, and opens into the inferior meatus of nose. *A fold of mucous membrane called the valve of Hasner forms an imperfect valve at the lower end of the duct. <img src=" /> Ref: BDC. vol3,sixth edition pg 76.', 'role': 'assistant'}]