Which of the following is the oldest edible coating done on citrus fruits for food safety?

Correct option is C

• Edible or food-grade coatings are commonly applied on fresh fruits to reduce moisture loss, slow respiration, and extend shelf life.
• Historically, wax coatings were the first used on citrus fruits such as oranges and lemons to maintain quality and reduce post-harvest losses.
• Wax coatings provide a barrier to moisture diffusion and gas exchange, helping retain freshness and protect against shrinkage and spoilage.