Multiple choice

Which of the following is not a method of preservation?

  1. Deep freezing

  2. Canning

  3. Pasteurization

  4. Immunization

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Deep freezing involves keeping food  at low temperature to prevent growth of micro organisms. Canning involves preservation through cutting off atmospheric contact with food. Pasteurization is a method of preserving milk by boiling and cooling it immediately. Thereafter, immunization refers to the protection against diseases by vaccination and is thus not a method of preservation. 

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