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': 'Sudden painful loss of vision seen in –a) Angle closure glaucomab) Central retinal artery occlusionc) Acute uveitisd) Endophthalmitise) Retinal detachment \nSelect and explain. \nA. abc, B. acd, C. bc, D. bde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Causes of sudden painful loss of vision are :- Acute angle closure glaucoma, acute iridocyclitis (acute uveitis), chemical or mechanical injury to eye, endophthalmitis and optic neuritis.', 'role': 'assistant'}]