This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intracellular Accumulations, Subject name: Pathology
Shape of birbicks granules is - 
Select and explain. 
A. Hockeystick, B. Bat, C. Ball, D. Tennis racket
D: Tennis racket
Answer: D: Tennis racket 
Explanation: Ans. is 'd' i.e., Tennis racket o Under the electron microscope, Birbeck granules have a pentalaminar, rod!ike, tubular appearance and sometimes a dilated terminal end resembling tennis-racket appearance.