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: Pathology
Large Intracytoplasmic glycogen storage is seen in which of the following malignancy - 
Select and explain. 
A. Osteosarcoma, B. Mesenchymal chondrosarcoma, C. Ewing's sarcoma, D. Leiomyosarcoma
C: Ewing's sarcoma
Answer: C: Ewing's sarcoma 
Explanation: None