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
Letterer-seiwe disease is a disturbance of 
Select and explain. 
A. Protein metabolism, B. Histiocytic disorder, C. Mucopolysaccharide metabolism, D. Carbohydrate metabolism
B: Histiocytic disorder
Answer: B: Histiocytic disorder 
Explanation: None