This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen: Miscellaneous, Subject name: Anatomy
[{'content': 'Posterior superior alveolar aery is a branch of: \nSelect and explain. \nA. Nasal branch of maxillary aery, B. Palatal branch of maxillary aery, C. Mandibular aery, D. Inferior alveolar aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Posterior superior alveolar aery arises from third pa of maxillary aery just before it enters the pterygomaxillary fissure. BRANCHES OF MAXILLARY AERY', 'role': 'assistant'}]