This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Nasolacrimal duct opens in: \nSelect and explain. \nA. The mouth opposite upper 2nd molar, B. Middle meatus of nose, C. Superior meatus of nose, D. Inferior meatus of nose', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The nasolacrimal duct is about 0.5 in. (1.3 cm) long and emerges from the lower end of the lacrimal sac.The duct descends downward, backward, and laterally in a bony canal and opens into the inferior meatus of the nose. The opening is guarded by a fold of mucous membrane known as the lacrimal fold. This prevents air from being forced up the duct into the lacrimal sac on blowing the nose.', 'role': 'assistant'}]