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
Cranial nerve related to apex of the petrous temporal bone: 
Select and explain. 
A. IX, B. VIII, C. VII, D. VI
D: VI
Answer: D: VI 
Explanation: Apex of petrous temporal bone is related to cranial nerve V and VI.