Which combination of amino acids represents a complete set of essential amino acids?

• A. Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine
• B. Arginine, Glutamate, Glutamine, Proline, Serine, Tyrosine, Cysteine, Asparagine, Aspartate
• C. Alanine, Glycine, Serine, Cysteine, Tyrosine, Proline, Glutamine, Asparagine, Aspartate
• D. Glycine, Alanine, Serine, Cysteine, Tyrosine, Proline, Glutamine, Asparagine, Aspartate

Answer: (A)