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
Features of vernal keratitis are: 
Select and explain. 
A. Papillary hyperophy, B. Follicular hyperophy, C. Herbe's pits, D. All
A: Papillary hyperophy
Answer: A: Papillary hyperophy 
Explanation: A i.e. Papillary hyperophy