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
Corneal sensation is lost in – 
Select and explain. 
A. Herpes simplex, B. Conjunctivitis, C. Fungal infection, D. Trachoma
A: Herpes simplex
Answer: A: Herpes simplex 
Explanation: There is marked diminution of corneal sensations in herpetic dendritic ulcer.