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 keratoconjunctivitis are: 
Select and explain. 
A. Papillary hyperophy, B. Shield's ulcer, C. Trantra's spot, D. All
D: All
Answer: D: All 
Explanation: Ans. A, B and C