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': 'Birdshot retinopathy is characterized by all except? \nSelect and explain. \nA. Common in females, B. Unilateral, C. HLA-A29 positive, D. Creamy yellow spots', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Unilateral Bird-shot retinochoroidopathy It is a rare, idiopathic, bilaterally symmetrical chronic multifocal chorioretinitis characterised by numerous flat creamy-yellow spots due to focal chorioretinal hypopigmentation, resembling the pattern of "bird-sho scatter from a shotgun". The disease, more common in females than males, typically affects middle-aged healthy persons who are positive for HLA-A29. It runs a long chronic course of several years. Treatment with coicosteroids is usually not effective', 'role': 'assistant'}]