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
Maxillary sinus opens into? 
Select and explain. 
A. Superior meatus of nose, B. Middle meatus of nose, C. Inferior meatus of nose, D. Hiatus semilunaris of middle meatus of nose
D: Hiatus semilunaris of middle meatus of nose
Answer: D: Hiatus semilunaris of middle meatus of nose 
Explanation: None