This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following bones has no medullary cavity 
Select and explain. 
A. Ulna, B. Clavicle, C. Fibula, D. Humerus
B: Clavicle
Answer: B: Clavicle 
Explanation: Clavicle: There is no medullary cavity BD CHAURASIA S HUMAN ANATOMY Vol 1 Pg no. 7