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
Pathognomonic sign of Acute Iridocyclitis is – 
Select and explain. 
A. Aqueous flare, B. Keratic precipitates, C. Small pupil, D. All of the above
B: Keratic precipitates
Answer: B: Keratic precipitates 
Explanation: Keratic precipitates (KPs) on posterior surface of cornea are pathognomonic of the involvement of ciliary body in the inflammation.
Earliest sign of anterior uveitis → aqueous flare.
Pathognomonic sign → Keratic precipitate