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': 'Occur in epidemics: \nSelect and explain. \nA. Entero virus conjunctivitis, B. Staphylococcal conjunctivitis, C. Adeno virus conjunctivitis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. All of the above', 'role': 'assistant'}]