This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
Hutchinson's rule is related to 
Select and explain. 
A. Herpes simplex keratitis, B. Mycotic keratitis, C. Herpes zoster Ophthalmicus, D. Vernal keratitis
C: Herpes zoster Ophthalmicus
Answer: C: Herpes zoster Ophthalmicus 
Explanation: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 110, 166) *Hutchinson's rule:- In herpes zoster ophthalmicus, the involvement of the tip of the nose, supplied by external nasal nerve (a terminal branch of nasociliary nerve), signifies increase the risk of ocular involvement (uveitis).