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
Hutchinson’s rule is related to 
Select and explain. 
A. Herpes simplex keratitis, B. Mycotic keratitis, C. Herpes zoster ophthalmicus, D. None
C: Herpes zoster ophthalmicus
Answer: C: Herpes zoster ophthalmicus 
Explanation: 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. 
Occurs commonly in immunocompromised individuals. Hutchinson's rule implies that ocular involvement is frequent if the side or tip of the nose presents vesicles is useful but not infallibleReference: Comprehensive Ophthalmology,