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: Surgery
[{'content': 'Maxillary sinus opens into? \nSelect and explain. \nA. Superior meatus of nose, B. Middle meatus of nose, C. Inferior meatus of nose, D. Hiatus semilunaris of middle meatus of nose', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]