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
During extraction of a maxillary molar a root tip is left in the maxillary sinus. The treatment of choice is: 
Select and explain. 
A. Perform Caldwell-Luc to remove the tip, B. Perform hemi maxillectomy, C. Enlarge opening in the socket area, D. No treatment indicated
A: Perform Caldwell-Luc to remove the tip
Answer: A: Perform Caldwell-Luc to remove the tip 
Explanation: None