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
In Langerhans cell histiocytosis, the characteristic abnormality seen on microscopy is - 
Select and explain. 
A. Bibecks granules, B. Foamy macrophages, C. Giant cells, D. Plasma cells
A: Bibecks granules
Answer: A: Bibecks granules 
Explanation: . Bibecks granules