This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Orbital apex syndrome involves \nSelect and explain. \nA. Ophthalmic division of trigeminal nerve, B. Olfactory nerve, C. Maxillary division of trigeminal nerve, D. Mandibular division of trigeminal nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Orbital apex syndrome is a complication of a paranasal sinus infection. Superior orbital fissure syndrome along with the involvement of maxillary division of trigeminal nerve and optic nerve is known as orbital apex syndrome. In superior orbital fissure syndrome, there is progressive paralysis of abducent, oculomotor and trochlear nerves. Ref: Diseases of ENT by Dhingra 6th edition Pgno : 200', 'role': 'assistant'}]