This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Which of the following structure is not related to cavernous sinus? 
Select and explain. 
A. Abducent nerve, B. Optic nerve, C. Ophthalmic nerve, D. Trochlear nerve
B: Optic nerve
Answer: B: Optic nerve 
Explanation: Five structures in lateral wall of cavernous sinus1. Oculomotor nerve 2. Trochlear nerve 3. Ophthalmic nerve 4. Maxillary nerve 5. Trigeminal ganglion Note: Internal carotid aery wrapped in its venous and sympathetic plexus along with abducent nerve passes through the center of the cavernous sinus.