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: Ophthalmology
[{'content': 'Ophthalmoplegic migraine is best defined by: \nSelect and explain. \nA. Headache with irreversible loss of ophthalmic nerve function, B. Recurrent transient 3rd nerve palsy associatedwith headache, C. Recurrent transient 3rd, 4th and/or 6th nerve palsyassociated with headache, D. Headache associated with optic neuritis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Opthalmoplegic migraine is thought to be a recurrent demyelinating neuropathy with a migraine like headache accompanied or followed by diplopia & weakness of cranial nerves that move the eye - III, IV or VI. The third nerve is most commonly involved. Ref: Migraine By Britt Talley Daniel MD, Britt Talley Daniel - Page 264.', 'role': 'assistant'}]