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 an appropriate material for composite hand instruments? 
Select and explain. 
A. Stainless steel, B. Teflon, C. Teflon coated metal, D. Nonmetallic
A: Stainless steel
Answer: A: Stainless steel 
Explanation: None