Maximum N content found in N fertilizer? (IFFCO 2022)

✅Explanation:
Propionic acid and its salts (such as calcium propionate and sodium propionate) are commonly used as preservatives in bread and other baked goods, often in conjunction with sorbic acid.

📌 Other Options Explanations:
-Sulphur dioxide: Used as a preservative in some foods and beverages.
-Nitrates: Primarily used in cured meats to inhibit the growth of Clostridium botulinum (which causes botulism) and to provide a characteristic color and flavor.
-Benzoic acid: More commonly used as a preservative in acidic foods like jams, pickles, and fruit juices.