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 keratoconjunctivitis are: \nSelect and explain. \nA. Papillary hyperophy, B. Shield's ulcer, C. Trantra's spot, D. All", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. A, B and C', 'role': 'assistant'}]