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': 'Cranial nerve related to apex of the petrous temporal bone: \nSelect and explain. \nA. IX, B. VIII, C. VII, D. VI', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Apex of petrous temporal bone is related to cranial nerve V and VI.', 'role': 'assistant'}]