Dettol is an example of

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Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Butylated hydroxy anisole when added to butter increases its shelf life.
Reason $R$: Butylated hydroxy anisole is more reactive towards oxygen than food.
In the light of the above statements,choose the most appropriate answer from the options given below:

Assertion : The addition of $BHA$ to butter increases its storage life from months to years.
Reason : Butylated hydroxy anisole $(BHA)$ is an antioxidant.