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
Final product in alginate is? 
Select and explain. 
A. Sodium alginate, B. Potassium alginate, C. Trisodium phosphate, D. Calcium alginate
D: Calcium alginate
Answer: D: Calcium alginate 
Explanation: None