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: Dental
"Birbeck granules" are seen in 
Select and explain. 
A. Melanosomes, B. Lamellar bodies, C. Keratohyalin granules, D. Langerhan cells
D: Langerhan cells
Answer: D: Langerhan cells 
Explanation: "Tennis racket" shaped Birbeck granules are seen in Langerhan cells, which are antigen presenting cells present in epidermis.