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
[{'content': 'Corneal sensation is lost in – \nSelect and explain. \nA. Herpes simplex, B. Conjunctivitis, C. Fungal infection, D. Trachoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There is marked diminution of corneal sensations in herpetic dendritic ulcer.', 'role': 'assistant'}]