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
Leukoplakia appears white due to : 
Select and explain. 
A. Cornified layer which imbibes water., B. Thick epithelium, C. Underlying connective tissue, D. All of the above
A: Cornified layer which imbibes water.
Answer: A: Cornified layer which imbibes water. 
Explanation: None