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
Unattached gingiva: 
Select and explain. 
A. Is interdental gingiva, B. Is below mucogingival fold, C. c)	Cannot be separated by probe, D. d)	Is marginal gingiva
D: d)	Is marginal gingiva
Answer: D: d)	Is marginal gingiva 
Explanation: None