Which one is a type of antioxidant?

Which choice below is a type of antioxidant?
1)Metal chelating agents
2) Oxidation promoters
3)Heavy metals
4)Fats, oils and lipid-based foods
5)Peroxy or alkoxy free radicals
Answers:
Please do your own homework with suggestion to your study materials. Source(s): http://en.wikipedia.org/wiki/Antioxidant

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