This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Angle-Closure Glaucoma, Subject name: Ophthalmology
[{'content': "Cause of red congested painful eye with mild dilated vertically oval pupil \nSelect and explain. \nA. Acute congestive glaucoma, B. Anterior uveitis, C. Keratoconjunctivitis, D. Eale's disease", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' ie. Acute congestive glaucomaDifferential diagnosis of common caused of Red eye* Acute conjunctivitisAcute anterior uveitisAcute congestive glaucomaCorneal trauma or infectionDischargeWateryNoneNoneWatery or purulentPainNoneModerateSevereMod to severeVisionNo effectSlightly blurredMarkedly blurredUsually blurredConjunctival injectionDiffuse; more towards fornicesMainly circumcornealMainly circumcornealMainly circumcornealCorneaClearUsually clearSteamyChanges in clarity related to causePupilNormalMiotic and unequalDilated , oval & fixedNormal or smallIOPNormalNormalElevatedNormalAC depthNDeepShallow", 'role': 'assistant'}]