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
Only impression material compatible with electroplating: 
Select and explain. 
A. Hydrocolloids., B. Polyether., C. Polysulphide, D. Addition silicone.
C: Polysulphide
Answer: C: Polysulphide 
Explanation: None