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: Unknown
[{'content': 'Lymphatic Drainage of the Maxillary Sinus goes first to \nSelect and explain. \nA. Upper Deep Cervical Lymph Nodes, B. Submental Nodes, C. Submandibular Nodes, D. Retropharyngeal Nodes', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Through the posterior pathway, the lymphatics from the maxillary and ethmoid sinuses drain into the retropharyngeal lymph nodes', 'role': 'assistant'}]