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
Catalyst used in condensation silicone: 
Select and explain. 
A. Chloroplatinic acid., B. Stannous octoate., C. Lead dioxide., D. Lead acetate.
B: Stannous octoate.
Answer: B: Stannous octoate. 
Explanation: None