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: ENT
[{'content': 'Dehiscence of anterior wall of the external auditory canal cause infection in the parotid gland via - \nSelect and explain. \nA. Fissure of santorini, B. Notch of rimus, C. Petrous fissure, D. Retropharyngeal fissure', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The cartilaginous part of external auditory canal—the “fissures of santorini” through which infections can pass from external\xa0ear to parotid and vice versa.\nThe deficiency present in bony part is “Foramen of Huschke” seen in children up to the age of 4. Through this infections of ear\xa0can also pass to parotid gland.\n\nRef. Dhingra 6/e, p 2, 5/e, p4', 'role': 'assistant'}]