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
Rubber Dam was introduced in dentistry? 
Select and explain. 
A. S C Burnam in 1864, B. SC Burnam in 1856, C. Jogren in 1856, D. Bunocore in 1864
A: S C Burnam in 1864
Answer: A: S C Burnam in 1864 
Explanation: None