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
Gingiva is attached by: 
Select and explain. 
A. Junctional epithelium, B. Epithelial attachment, C. Reduced enamel epithelium, D. None of the above
A: Junctional epithelium
Answer: A: Junctional epithelium 
Explanation: None