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
Percentage of tin in low copper alloy is 
Select and explain. 
A. 30-35%, B. 26-28%, C. 13-32%, D. 22-30%
B: 26-28%
Answer: B: 26-28% 
Explanation: None