<prompt> Essential amino acid is ?AlanineSerineArginineProline  <response>: Ans. is c i.e., Arginine Nutritionally Essential Nutritionally Nonessential Arginine Alanine Histidine Asparagine Isoleucine Leucine Asparatate Lysine Cysteine Methionine Phenylalanine Glutamate Threonine Tryptophan Valine Glutamine Glycine Proline Serine Tyrosine 