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 for eosinophilic granuloma is? 
Select and explain. 
A. Radius, B. Skull, C. Lumbar veebra, D. Femur
B: Skull
Answer: B: Skull 
Explanation: Ans. is 'b' i.e., Skull The most common sites are skull bones, long bones, spinal veebrae, mastoid and mandible.