This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity & Tongue, Subject name: Anatomy
Plica triangularis is present in - 
Select and explain. 
A. Antero-inferior part of tonsil, B. Dorsum of tongue, C. Inlet of larynx, D. None
A: Antero-inferior part of tonsil
Answer: A: Antero-inferior part of tonsil 
Explanation: Ans. is 'a' i.e., Antero-inferior part of tonsil o The plica triangularis is a triangular vestigial fold that of mucous membrane covering the anteroinferior part of the tonsil.o The plica semilunaris is a semilunar fold that may cross the upper part of the tonsillar sinus,o For tonsil see explanation 3 of session 1.