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: ENT
[{'content': 'All of the following drain into middle meatus, EXCEPT: \nSelect and explain. \nA. Lacrimal duct, B. Maxillary sinus, C. Frontal sinus, D. Ethmoidal sinus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The lacrimal gland lies in the superolateral corner of the orbit. Tears drain from the eyeball, the nasolacrimal duct, into the inferior nasal meatus of the nasal cavity. The lacrimal gland is innervated by visceral motor parasympathetic neurons from CN VII.', 'role': 'assistant'}]