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
Normal depth of gingival Sulcus in adult does not exceed 
Select and explain. 
A. 0.5 - 1mm, B. 2 -3 mm, C. 1-2 mm, D. 1 - 3 mm
B: 2 -3 mm
Answer: B: 2 -3 mm 
Explanation: None