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Option 1 : BHT (Butylated hydroxytoluene), and N2 (dinitrogen)
BHT (Butylated hydroxytoluene) and N2 (dinitrogen) are added to foods containing fats and oils to prevent the process of Rancidity. When foods containing oils and fats are exposed to oxygen, they get oxidised due to which food becomes stale and its colour and smell changes. This process is called rancidity.
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