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
The epithelium which has only keratin layer, no nuclei is: 
Select and explain. 
A. Parakeratinized epithelium., B. Nonkeratinized epithelium., C. Orthokeratinized epithelium., D. None of the Above.
C: Orthokeratinized epithelium.
Answer: C: Orthokeratinized epithelium. 
Explanation: Epithelium of Oral Mucosa