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': 'Which of the following indicates activity of anterior uveitis? \nSelect and explain. \nA. Cells in anterior chamber, B. Circumcorneal congestion, C. Keratic precipitate, D. Corneal edema', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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", 'role': 'assistant'}]