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 two cements which hold with the tooth are: 
Select and explain. 
A. GIC and polycarboxylate, B. GIC and ZnPO4, C. ZnPO4 and silicate, D. GIC and silicate
A: GIC and polycarboxylate
Answer: A: GIC and polycarboxylate 
Explanation: None