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
Caldwell Luc procedure is carried out to access? 
Select and explain. 
A. Orbital cavity, B. Maxillary sinus, C. Nasal floor, D. Submandibular space
B: Maxillary sinus
Answer: B: Maxillary sinus 
Explanation: None