This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
[{'content': 'X ray features of sarcoidosis stage 2 as per scadding system is? \nSelect and explain. \nA. Peripheral hilar lymphadenopathy, B. Diffuse fibrosis, C. Pleural effusion, D. Mediastinal lymphadenopathy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref : David Sutton 9th ed', 'role': 'assistant'}]