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
Which of the following is not true about hand instruments used in Operative Dentistry? 
Select and explain. 
A. They are generally made of stainless steel, B. Nickel-Cobalt-chromium is never used in its fabrication, C. Carbon steel is more efficient than stainless steel, D. It can be made with stainless steel with carbide inserts
B: Nickel-Cobalt-chromium is never used in its fabrication
Answer: B: Nickel-Cobalt-chromium is never used in its fabrication 
Explanation: None