This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
Which is false about Alkaptonuria? 
Select and explain. 
A. Genitourinary system not involved, B. Hemogentistic oxidase deficiency, C. Black urine, D. Calcification in veebral bodies
A: Genitourinary system not involved
Answer: A: Genitourinary system not involved 
Explanation: 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