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
Earliest sign of Acute Anterior Uveitis is 
Select and explain. 
A. Lid oedema, B. Aqueous flare, C. Keratic precipitate, D. Hypopyon
B: Aqueous flare
Answer: B: Aqueous flare 
Explanation: Earliest sign of Acute Anterior Uveitis is Aqueous flare.