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
Most common accelerator added to gypsum product 
Select and explain. 
A. Sodium Chloride, B. Potassium sulphate, C. Sodium Phosphate, D. Acetates
B: Potassium sulphate
Answer: B: Potassium sulphate 
Explanation: None