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: Dental
Apex of maxillary sinus points towards 
Select and explain. 
A. Zygomatic bone, B. Nasal Cavity, C. Orbital surface, D. None of the above
A: Zygomatic bone
Answer: A: Zygomatic bone 
Explanation: None