This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Lymphatic drainage of anterior pa of nose is to \nSelect and explain. \nA. Submandibular LN, B. Parotid, C. Pretracheal LN, D. Retropharyngeal LN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lymphatic from the anterior half of the lateral wall pass to the submandibular nodes,and from the posterior half,to the retropharyngeal and upper deep cervical nodes. Ref BDC volume;3,Sixth edition', 'role': 'assistant'}]