This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerves, Subject name: Anatomy
Post Superior Alveolar Nerve is a branch of: 
Select and explain. 
A. Mandibular, B. Facial, C. Lingual, D. Maxillary
D: Maxillary
Answer: D: Maxillary 
Explanation: Posterior superior alveolar nerve is a direct branch of Maxillary Nerve. It supplies mainly the molar teeth. It also supplies the maxillary sinus, gingiva and inner cheek region.