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Microorganisms - Friend and Foe (Class VIII)

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Multiple Choice

Which of the following can be used as food preservative(s)?

a. Sodium benzoate
b. Sodium hydroxide
c. Citric acid
d. Butachlor

  1. Only a and c
  2. Only a and b
  3. Only b and d
  4. Only a and d
  5. Only c and d
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