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: Medicine
All of the following are potentially cured by chemotherapy except - 
Select and explain. 
A. Hodgkins, B. ALL, C. Wilm's tumour, D. Chondrosarcoma
D: Chondrosarcoma
Answer: D: Chondrosarcoma 
Explanation: None