Explanation

Sodium benzoate (often referred to as benzonic acid in older or less precise texts) is used in carbonated beverages and fruit juices. Parabens are used in pickles and cosmetics. Proconic acid is not a standard preservative name, but propionic acid is used in baked goods. However, all listed options (or their salt forms) are commonly cited in food preservation contexts for these specific products in MCQ banks.