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
On stretching the cheek the lesion disappears in: 
Select and explain. 
A. Leukoplakia, B. Focal hyperkeratosis, C. Leukoedema, D. Typhoid
C: Leukoedema
Answer: C: Leukoedema 
Explanation: None