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': 'Hutchinson’s rule is related to \nSelect and explain. \nA. Herpes simplex keratitis, B. Mycotic keratitis, C. Herpes zoster ophthalmicus, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Hutchinson's rule is related to herpes zoster ophthalmicus which is an acute infection of Gasserian ganglion of the fifth cranial nerve by the varicella-zoster virus. \nOccurs\xa0commonly in immunocompromised individuals. Hutchinson's rule implies that ocular involvement is frequent if the side or tip\xa0of the nose presents vesicles is useful but not infallibleReference: Comprehensive Ophthalmology,", 'role': 'assistant'}]