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
Which of the following maliganat diseases of children has the best prognosis ? 
Select and explain. 
A. Wilm's tumour, B. Neuroblastoma, C. Khabdomyosarcoma, D. Primitive neuroectodermal tumour
A: Wilm's tumour
Answer: A: Wilm's tumour 
Explanation: None