This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bones, Subject name: Pathology
Most common malignant bone tumor - 
Select and explain. 
A. Osteogenic sarcoma, B. Secondaries, C. Osteoma, D. Enchondroma
B: Secondaries
Answer: B: Secondaries 
Explanation: Ans. is 'b' i.e., Secondarieso Secondaries are most common malignant bone tumor,o Osteogenic sarcoma is the most common primary malignant bone tumor,o Osteoma is most common benign bone tumor.