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
Ewing's tumour arises from- 
Select and explain. 
A. Mesothelial cell, B. Endothelial cell, C. Squamous cell, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Ans. is 'd' i.e., None of the above o Ewig's sarcoma arises from primitive neuroectoderm.