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
Neuroparalytic keratitis is due to which cranial nerve: 
Select and explain. 
A. 3rd nerve, B. 5th nerve, C. 6th nerve, D. 7th nerve
B: 5th nerve
Answer: B: 5th nerve 
Explanation: Ans. 5th nerve