The correct answer is: C. Chromium and iron
Stainless steel is an alloy of iron and chromium. It is a very strong and durable material that is resistant to corrosion. Stainless steel is used in a wide variety of applications, including construction, appliances, and cookware.
Chromium is the main alloying element in stainless steel. It is what gives stainless steel its corrosion resistance. Chromium forms a thin layer of oxide on the surface of the steel that protects it from rust.
Iron is the other main alloying element in stainless steel. It provides the strength and toughness of the steel.
Other elements, such as nickel, molybdenum, and manganese, may also be added to stainless steel to improve
its properties.A. Chromium and carbon is not the correct answer because carbon is not a necessary element in stainless steel. Carbon can be added to stainless steel to improve its strength, but it is not required.
B. Chromium, carbon and iron is not the correct answer because carbon is not a necessary element in stainless steel. Carbon can be added to stainless steel to improve its strength, but it is not required.
D. Carbon and iron is not the correct answer because stainless steel is an alloy of iron and chromium. Carbon is not a necessary element in stainless steel.