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
Following are true about thyroglossal cyst EXCEPT 
Select and explain. 
A. Often occur in children; they may also present in adults, B. Rarely may contain only functioning thyroid tissue, C. Treated surgically by Sistrunks operation, D. Moves downwards on tongue protrusion
D: Moves downwards on tongue protrusion
Answer: D: Moves downwards on tongue protrusion 
Explanation: None