<prompt> Millons test is used for detection of -PhenylalnineCystineTyrosineTryptophan  <response>: Ans. C. TyrosineMillons test:-Phenolic amino acids such as Tyrosine and its derivatives respond to this test. Compounds with a hydroxybenzene radical react with Millons reagent to form a red colored complex. The reagent is made by dissolving metallic mercury in nitric acid and diluting with water. 