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: Orthopaedics
True about bone tumor is - 
Select and explain. 
A. Multiple myeloma-more than 55 years age and above, B. Osteogenic sarcoma-fourth decade, C. Chondrosarcoma-first decade, D. Osteoclastoma-fifth decade
A: Multiple myeloma-more than 55 years age and above
Answer: A: Multiple myeloma-more than 55 years age and above 
Explanation: None