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: Radiology
Which among the following bone tumours is radio resistant? 
Select and explain. 
A. Osteosarcoma, B. Fibrosarcoma, C. Melanoma, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Renal cell carcinoma is also relatively radio resistant. Seminoma is highly radio sensitive.