This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: ENT
[{'content': 'Which among the following is not a part of Waldeyer ring: \nSelect and explain. \nA. Lingual tonsil, B. Palatine tonsil, C. Adenoids, D. Thyroid gland', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: d (Thyroid gland) Ref: Dhingra 4th ed p 223Scattered lymphatics in the subepithelial layer of pharynx forms masses at certain places, collectively termed as waldeyer ring.The masses are:1) Nasopharyngeal tonsil (Adenoids)2) Palatine tonsil3) Lingual tonsil4) Tubal tonsil (in fossa of Rossen Muller)5) Lateral pharyngeal band6) Nodules in posterior pharyngeal wall.', 'role': 'assistant'}]