Discussion
Cold sterilization refers to the preservation of food by :
Answer: A
Cold sterilization means preservation of food by radiation.
Ionising radiation, such as gamma rays from cobalt-60, electron beams or X-rays, kills microorganisms and insects by damaging their DNA without significantly heating the food. Because sterilisation is achieved without heat, food irradiation is called cold sterilization (or cold pasteurisation).
Dehydration and lyophilisation (freeze-drying) preserve food by removing water, which stops microbial growth but does not sterilise. Refrigeration only slows microbial growth. None of them kills the microbes in the way the term implies.
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