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
Which of the following cement is called as Artificial dentin? 
Select and explain. 
A. Type 2 GIC, B. Silicophosphate, C. Amalgam, D. Zinc phosphate
B: Silicophosphate
Answer: B: Silicophosphate 
Explanation: Coefficient of thermal expansion of silicophosphate matches with dentin.
While of type 2 GIC with enamel.