This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Dehiscence in the external auditory canal cause infection in the parotid gland via: 
Select and explain. 
A. Fissure of Santorini, B. Notch of Rivinus, C. Petro-tympanic fissure, D. Retro pharyngeal fissure
A: Fissure of Santorini
Answer: A: Fissure of Santorini 
Explanation: (a) Fissure of Santorini(Ref. Cummings, 6th ed., 1981)The notch of Rivinus is the upper attachment of pars flaccida.Petro-tympanic fissure is present on the anterior wall of middle ear, on which attaches the anterior malleolar ligament.Retropharyngeal fissure does not exist.