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 "V" shaped space that encircles the tooth and
present between tooth and gingiva is known as: 
Select and explain. 
A. Inter dental papilla, B. Free gingiva, C. Attached gingiva, D. Gingival sulcus
D: Gingival sulcus
Answer: D: Gingival sulcus 
Explanation: None