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': 'Earliest sign of Acute Anterior Uveitis is \nSelect and explain. \nA. Lid oedema, B. Aqueous flare, C. Keratic precipitate, D. Hypopyon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Earliest sign of Acute Anterior Uveitis is Aqueous flare.', 'role': 'assistant'}]