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: Dental
Difference between the skin and mucosa of cheek is: 
Select and explain. 
A. Thin lamina and non keratinized mucosa of cheek, B. Keratinized mucosa of cheek, C. Rete pegs, D. Thick lamina propria on skin of cheek
A: Thin lamina and non keratinized mucosa of cheek
Answer: A: Thin lamina and non keratinized mucosa of cheek 
Explanation: None