This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': "Delphian's nodes are NOT RELATED - ENT \nSelect and explain. \nA. Pre-Larynxgeal, B. Upper deep cervical, C. Retropharyngeal, D. Posterior triangle", 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]