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 cement, which is least soluble in oral cavity: 
Select and explain. 
A. Glass ionomer, B. Resin cement, C. Polycarboxylate cement, D. Silico — phosphate cement
B: Resin cement
Answer: B: Resin cement 
Explanation: None