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
Which of the following does not form ring of Waldeyer 
Select and explain. 
A. Adenoids, B. Eustachian, C. Palatine, D. None
D: None
Answer: D: None 
Explanation: Ring of Waldeyer consists of following tonsils

 Nasopharyngeal(Adenoids)
 Eustachian
 Palatine
 Lingual