Explain the advantages of food additives.

Among the following, which one acts as a food preservative?

Which of the following processes is not used to preserve the food?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$