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 consistency of the subgingival calculus is described to be: 
Select and explain. 
A. Clay like, B. Flint like, C. Brick like, D. Soft
B: Flint like
Answer: B: Flint like 
Explanation: None