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
Chromium is used in stainless steel for which purpose? 
Select and explain. 
A. Corrosion resistance, B. Increases the lustre of stainless steel, C. Stabilization of the alloy, D. Increases the hardness of steel
A: Corrosion resistance
Answer: A: Corrosion resistance 
Explanation: None