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
Gingival sulcus is V shaped and it barely permits the entrance of a 
Select and explain. 
A. Periodontal hoe, B. Periodontal curette, C. Periodontal probe, D. Periodontal sickle
C: Periodontal probe
Answer: C: Periodontal probe 
Explanation: None