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
Which of the following indicates activity of anterior uveitis? 
Select and explain. 
A. Cells in anterior chamber, B. Circumcorneal congestion, C. Keratic precipitate, D. Corneal edema
A: Cells in anterior chamber
Answer: A: Cells in anterior chamber 
Explanation: Ans. is 'a' i.e., Cells in anterior chamber Activity of acute anterior uveitis is indicated by presence of cells (aquous cells) and flare in anterior chamber-Grading is done on these two. Grade Aquous cells Grade Aquous flare 0 cells 0 no flare +_ 1-5 cells +1 Just detectable +1 6-10 cells +2 Moderate flare +2 11-20 cells +3 Marked flare +3 21-50 cells +4 Intense flare +4 > 50 cells