<prompt> Which is false about Alkaptonuria?Genitourinary system not involvedHemogentistic oxidase deficiencyBlack urineCalcification in veebral bodies  <response>: It is a metabolic defect due to homogentisate oxidase deficiency Blackening of urine is seen on standing But genitourinary system is not involvedRef: Textbook of biochemistry for medical students, seventh edition, page no: 237 