Essential amino acid is ?
Alanine
Serine
Arginine
Proline
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