Positive Ferric chloride urine test is due to:: (A) Phenylalanine, (B) Phenylacetate, (C) Phenylpyruvate, (D) Phenylaspaate
Answer is C. Diagnostic test for phenylketonuria: This is a screening test in urine sample for phenyl ketones and hence gives positive result for phenyl pyruvate Positive for:- Phenylketonuria Tyrosinemia MSUD Alkaptonuria