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
Which is a direct content of cavernous sinus? 
Select and explain. 
A. Ophthalmic division of trigeminal nerve, B. Trochlear nerve, C. Abducent nerve, D. Oculomotor nerve
C: Abducent nerve
Answer: C: Abducent nerve 
Explanation: Abducent nerve: Only cranial nerve passing through the centre of cavernous sinus.