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
The maxillary sinus drains into the 
Select and explain. 
A. Middle meatus, B. Inferior meatus, C. Superior meatus, D. Sphenoethmoidal recess
A: Middle meatus
Answer: A: Middle meatus 
Explanation: None