This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Shape of berbicks granules is - 
Select and explain. 
A. Hockey stick, B. Bat, C. Ball, D. Tennis racket
D: Tennis racket
Answer: D: Tennis racket 
Explanation: Birbeck granules are seen in langerhans cell histiocytosis. These are rod shaped structures having dilated tennis racket like terminal end. Reference : Harsh Mohan textbook of pathology, 7th edition.Pg no.365