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: Pediatrics
Infant presented with bony pain and some dematitis in scalp. Skull x-ray is given below. Electron microscopy of biopsy from a lesion is given below. What is the most  probable diagnosis? 
Select and explain. 
A. Multiple myeloma, B. Thalassemia, C. Langerhans cell histiocytosis, D. AML
C: Langerhans cell histiocytosis
Answer: C: Langerhans cell histiocytosis 
Explanation: None