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: Pathology
Most common site of eosinophilic granuloma ? 
Select and explain. 
A. Radius, B. Femur, C. Skull, D. Lumbar veebrae
C: Skull
Answer: C: Skull 
Explanation: Ans. is 'c' i.e., Skull