The correct class for Oxyreduc-tases, transferases, and hydrolases is enzymes. Enzymes are a type of protein that act as catalysts in various biochemical reactions. Oxyreduc-tases are enzymes that catalyze oxidation-reduction reactions, transferases are enzymes that catalyze the transfer of functional groups between molecules, and hydrolases are enzymes that catalyze the hydrolysis of chemical bonds by adding water.

Hormones, on the other hand, are signaling molecules that act on target cells to regulate various physiological processes. While some hormones may be proteins, not all enzymes are hormones.

Proteins are a broad category that includes enzymes, hormones, and many other types of molecules.

Vitamins are organic compounds that are required in small amounts for various biochemical reactions, but they are not enzymes or proteins.

Hence, the correct answer is option 2 - enzymes.