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: Anatomy
[{'content': 'Posterior superior alveolar artery is branch of - \nSelect and explain. \nA. Nasal branch of maxillary artery, B. Palatal branch of maxillary artery ., C. Mandibular artery, D. Inferior alveolar artery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]