Which from following is an essential aminoacid ?

Step-by-step solution

Essential amino acids must be obtained from dietary sources as they cannot be synthesized by the human body. The essential group includes phenylalanine, valine, tryptophan, threonine, isoleucine, methionine, histidine, arginine (conditionally essential), leucine, and lysine. Considering the options: Tyrosine is non-essential, synthesized from phenylalanine. Serine is non-essential. Histidine is essential. Glycine is non-essential. Only histidine belongs to the essential amino acids. C