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
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. 
Select and explain. 
A. cd, B. bc, C. bd, D. ac
A: cd
Answer: A: cd 
Explanation: None