This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
Gerlach tonsil in Waldayer's ring is? 
Select and explain. 
A. Tubal tonsil, B. Palatine tonsil, C. Pharyngeal tonsil, D. Lingual tonsil
A: Tubal tonsil
Answer: A: Tubal tonsil 
Explanation: Tubal tonsils also called as Gerlach&;s tonsils are located in nasopharynx on the lateral wall behind the eustachian tube opening. (Ref: Scott brown textbook of otorhinolaryngology and head and neck surgery Volume 1, Pg No. 285)