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
Which of the following is commonly involved in multiple myeloma: 
Select and explain. 
A. Clavicle, B. Vertebrae, C. Pelvis, D. Lungs
B: Vertebrae
Answer: B: Vertebrae 
Explanation: None