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
Nasolacrimal duct opens into the 
Select and explain. 
A. Supreme meatus, B. Superior meatus, C. Middle meatus, D. Inferior meatus
D: Inferior meatus
Answer: D: Inferior meatus 
Explanation: Nasolacrimal duct is membranous passage 18 mm long.it begins at the lower end of lacrimal sac, runs downwards, backward and laterally, and opens into the inferior meatus of the nose.A fold of mucous membrane called the valve of Hasner forms an imperfect valve at the lower end of the duct. Ref.BDC volume 3;sixth edition pg.76