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': "Features of vernal keratitis are: \nSelect and explain. \nA. Papillary hyperophy, B. Follicular hyperophy, C. Herbe's pits, D. All", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Papillary hyperophy', 'role': 'assistant'}]