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': 'Inferior meatus drains \nSelect and explain. \nA. Nasolacrimal duct, B. Frontal sinus, C. Posterior ethmoidal sinus, D. Maxillary sinus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]