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. Teflon, B. Teflon coated material., C. Stainless steel., D. Non metallic.
C: Stainless steel.
Answer: C: Stainless steel. 
Explanation: Stainless steel instruments should not be used because the composite will stick to the instrument.