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
Radial keratoneuritis is a feature of: 
Select and explain. 
A. Acanthamoeba keratitis, B. Herpes zoster keratitis, C. Neuroparalytic keratitis, D. All of the above
A: Acanthamoeba keratitis
Answer: A: Acanthamoeba keratitis 
Explanation: Ans. Acanthamoeba keratitis