This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy, Subject name: Radiology
Which of the following tumours is radiosensitive? 
Select and explain. 
A. Ewing's sarcoma, B. Malignant melanoma, C. Hepatocellular carcinoma, D. Osteosarcoma
A: Ewing's sarcoma
Answer: A: Ewing's sarcoma 
Explanation: Ans: a (Ewing's sarcoma)Ewing's sarcoma is a highly radiosensitive tumourRadio sensitive tumoursRadio resistant tumours# Seminoma# Osteosarcoma# Lymphoma# Melanoma# Myeloma# Pancreatic carcinoma# Ewings sarcoma# Hepatoma# Wilms tumour