Plica triangularis is present in -
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.