This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
Radioresistant tumour is 
Select and explain. 
A. Ewing's sarcoma, B. Osteosarcoma, C. Retinoblastoma, D. Neuroblastoma
B: Osteosarcoma
Answer: B: Osteosarcoma 
Explanation: Highly resistantHighly sensitiveMaligant melanomaOsteosarcomaSeminomaMultiple myelomaEwings sarcomaWilms tumourLymphoma(Ref: Harrison's principals of Internal medicine, 17th Ed page 612)