1. Only I, II and III 
  2. Only II, III and IV
  3. Only I, III and IV 
  4. All given elements are present
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Option 4 : All given elements are present

Stainless steel is generally a metal alloy, made up of steel mixed with elements such as chromium, nickel, molybdenum, silicon, aluminum, and carbon. Iron is mixed with carbon to produce steel which is the main component of stainless steel and Chromium is added to make it resistant to rust.
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