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
In Dacryocystorhinostomy, opening is done into: 
Select and explain. 
A. Superior meatus, B. Middle meatus, C. Inferior meatus, D. None of the above
B: Middle meatus
Answer: B: Middle meatus 
Explanation: Dacryocystorhinostomy (DCR) surgery is a procedure that aims to eliminate fluid and mucus retention within the lacrimal sac, and to increase tear drainage for relief of epiphora (water running down the face). Classic dacryocystorhinostomy (DCR) requires an external incision and drilling through the lacrimal bone into the middle meatus.