This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopedics Oncology, Subject name: Orthopaedics
True about bone tumor is: 
Select and explain. 
A. Multiple myeloma is seen in more than 55 years age and above, B. Osteogenic sarcoma-fouh decade, C. Chondrosarcoma -first decade, D. Osteoclastoma- fifth decade
A: Multiple myeloma is seen in more than 55 years age and above
Answer: A: Multiple myeloma is seen in more than 55 years age and above 
Explanation: AGE Tumors 1st Decade Ewing's sarcoma (Can be 5-20 years), Unicameral Bone Cyst Retinoblastoma Rhabdomyosarcoma Metastasis from Neuroblastoma 2nd Decade Osteosarcoma (Can affect all ages) Aneurysmal Bone Cyst Giant cell tumor (20-40 years-classical is 30 years) Adamantinoma Enchondroma After 40Yrs Multiple myeloma >Chondrosarcoma. Note: Ewing's sarcoma is commonest bone tumor of 1st decade but its peak incidence is 2nd decade.