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: Orthopaedics
Large intracytoplasmic glycogen storage is found in 
Select and explain. 
A. Fibrous dysplasia, B. Adamantinoma, C. Ewing's sarcoma, D. Osteoclastoma
C: Ewing's sarcoma
Answer: C: Ewing's sarcoma 
Explanation: None