Correct option is C
Methionine is a sulfur-containing amino acid that is vital for human health. It plays an essential role in the synthesis of proteins and other important molecules like S-adenosylmethionine (SAM), which is involved in methylation processes in the body. Methionine also contributes to the production of cysteine, another sulfur-containing amino acid, and is important in the formation of collagen and the regulation of gene expression. Sulfur amino acids like methionine are also crucial in detoxification and metabolism. Unlike many other amino acids, methionine must be obtained through diet, as the human body cannot synthesize it.