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
Langerhan's cells are absent in 
Select and explain. 
A. Junctional epithelium, B. Sulcular epithelium, C. Oral epithelium, D. All of the above
A: Junctional epithelium
Answer: A: Junctional epithelium 
Explanation: None