Chemical is the answer to the question, but nuclear could also be a valid one since it is nearly impossible to reverse that.
I would go with C, because you would always start with products and end with reactants.
Answer: 1. Sodium Benzoate
Explanation: An anti-oxidant is a substance that can help prevent or stop the damage done by free radicals. Examples include; Sulphur Dioxide, Sulphite Salts, Citric Acid, e.t.c
Sodium benzoate is a pure preservative.
