Scurvy results in weakness in collagen fibers because the enzymes that catalyze of proline and lysine residues in collagen require Vitamin C.

Hydroxylation

Explanation:

Hydroxylation is a chemical process that introduces a hydroxyl group (-OH) into an organic compound. In biochemistry, hydroxylation reactions are often facilitated by enzymes called hydroxylases. Hydroxylation is the first step in the oxidative degradation of organic compounds in air.

the answer would be a