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
only epithelium in the body in which type4 collagen is absent in basal lamina: 
Select and explain. 
A. Oral epithelium, B. Sulcular epithelium, C. Gingival epithelium, D. Junctional epithelium
D: Junctional epithelium
Answer: D: Junctional epithelium 
Explanation: None