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Refrigerators keep food unspoiled because
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- at its low temperature, bacteria and moulds are inactive
- at its low temperature, the germs are killed
- at its low temperature, the germs are frozen
- it sterilises the food
- at its low temperature, bacteria and moulds are inactive
Correct Option: A
Bacteria and moulds find conditions of low pH, moisture, or temperature and high salt or sugar unfavorable for their operation. This is the principle why refrigerators keep food unspoiled for a long time. Bacterial action is severely impaired at temperatures at or below 4 degree Celsius.
