Conditionally Essential amino acids are:: (A) Leucine & Lysine, (B) Histidine & Arginine, (C) Tyrosine & Cysteine, (D) Phenylalanine & Tryptophan
Answer is C. Conditionally Essential Amino Acids (CEAA): Non-essential amino acids may turn essential if their precursors are limited in the body. - Among given options Tyrosine (derived from Phenylalanine) and Cysteine (derived from methionine) are CEAA. - Other CEAA include Arginine Glutamine Taurine & Glycine.