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
All of the following paranasal sinuses drain into middle meatus, EXCEPT: 
Select and explain. 
A. Lacrimal duct, B. Maxillary sinus, C. Frontal sinus, D. Anterior group of ethmoidal sinus
A: Lacrimal duct
Answer: A: Lacrimal duct 
Explanation: None