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': "Waldeyer's ring consists of all of the following except? \nSelect and explain. \nA. Palatine tonsils, B. Pharyngeal tonsils, C. Tubal tonsils, D. Post auricular nodes", 'role': 'user'}, {'content': "Answer: D \nExplanation: In relation to the oropharyngeal isthmus, there are several aggregations of lymphoid tissue that constitute the WALDEYER'S lymphatic ring.\nThe most important aggregations are the right and left palatine tonsils.\nPosteriorly and above is the pharyngeal tonsil.\nLaterally and above are the tubal tonsils\nInferiorly there is the lingual tonsil over the posterior part of the dorsum of the tongue.", 'role': 'assistant'}]