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
18-8 Stainless steel orthodontic wire has: 
Select and explain. 
A. 18% Nickel 8% Chromium, B. 18% Chromium 8% Nickel, C. 18% Chromium 8% Cobalt, D. 18% carbon 8% Iron
B: 18% Chromium 8% Nickel
Answer: B: 18% Chromium 8% Nickel 
Explanation: None