This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
[{'content': "All of the following are boundaries of Trautman's triangle except: \nSelect and explain. \nA. Sigmoid sinus, B. Inferior petrosal sinus, C. Superior petrosal sinus, D. Bony labyrinth", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans b): Inferior petrosal sinusBoundaries of Trautman's triangle-Boundaries of Citelle's angle -Bony labyrinthSigmoid sinusSigmoid sinusSuperior petrosal sinusMiddle fossa dura plateSolid angle- angle formed by three semicircular canalsContent of canal of Huguier- Chorda tympaniDorello's canalIts the groove of 5th nerve- b/w petrous tip and sphenoid bone.", 'role': 'assistant'}]