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B
C. perfringens
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C
S. aureus
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D
Yeasts
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Solution
The correct option is AC. botulinum
Nitrates and nitrites have been used as food additives in cured meats and some cheeses to prevent the growth of Clostridium botulinum bacteria. Adding nitrites or nitrates improves the microbiological safety of these foods and extends their safe shelf life. Sodium nitrite is used for the curing of meat because it prevents bacterial growth and, as it is a reducing agent, in a reaction with the meat's myoglobin, gives the meat a desirable pink-red fresh colour.