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': 'Most common etiological variety of uveitis is: \nSelect and explain. \nA. Infective, B. Allergic, C. Toxic, D. Metabolic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Allergic', 'role': 'assistant'}]