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
Langerhan cells are not seen in: 
Select and explain. 
A. Letterer siwe disease., B. Fabrys disease., C. Histiocytosis., D. None.
B: Fabrys disease.
Answer: B: Fabrys disease. 
Explanation: None