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': 'Ring scotoma is seen in –a) Retinitis pigmentosa b) Glaucomac) Cataractd) Retinal detachment \nSelect and explain. \nA. ab, B. a, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ring scotoma is seen in retinitis pigmentosa, high myopia, POAG, aphakic spectacle correction and after panretinal photocoagulation.', 'role': 'assistant'}]