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: Medicine
[{'content': 'True about Eosinophillic granuloma -a) M.C. in 20-45 years of ageb) More common in femalec) Osteolytic lesiond) Skull is commonly affectede) Lung is commonly affected. \nSelect and explain. \nA. cd, B. bc, C. bd, D. ac', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]