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: Anatomy
[{'content': 'Which of the following structuers is inferior to spheno petrosal Synchondrosis- \nSelect and explain. \nA. Abducens nerve, B. Osseous pa of auditory tube, C. Cailaginus pa of auditory tube, D. Petro squamous sinus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sphenopetrosal synchondrosis is cailagenous union b/w lateral half margin of great wing of sphenoid & petrous bone. On the under surface of sphenopetrosal synchondrosis, is a furrow, the sulcus of auditory tube for lodgement of cailagenous pa of auditory tubeQ', 'role': 'assistant'}]