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: Pediatrics
All of the following are small round blue cell tumours except 
Select and explain. 
A. Ewing's sarcoma, B. Wilms tumour, C. Retinoblastoma, D. Rhabdomyosarcoma
D: Rhabdomyosarcoma
Answer: D: Rhabdomyosarcoma 
Explanation: Small round blue cell tumours.
Neuroblastoma.
Ewing's sarcoma.
Wilms tumour.
Medulloblastoma.
Retinoblastoma.
Lymphoma.
Primitive Neuroectodermal tumour.