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
[{'content': 'The "V" shaped space that encircles the tooth and\npresent between tooth and gingiva is known as: \nSelect and explain. \nA. Inter dental papilla, B. Free gingiva, C. Attached gingiva, D. Gingival sulcus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]