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': 'All are ocular emergency except: \nSelect and explain. \nA. Eye injury, B. Sympathetic ophthalmitis, C. Retinal aery occlusion, D. CRVO', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- (D) CRVOComon ophthalmic emergencies are :-Acute congestive glaucomaRuptured globeUlcerative or traumatic corneal diseasesOptic neuritisHyphemaEndophthalmitisAcute blindnessOrbital cellulitisEyelid or conjunctival lacerationCentral retinal aerial occlusion (CRAG)Anterior lens subluxationRetinal detachment', 'role': 'assistant'}]