Darkening of urine on standing is associated with:
a. Alkaptonuria(Ref: Nelson's 20/e p 636-642, Ghai 8/e p 653-655)Darkening of urine on standing is associated with Alkaptonuria, due to Homogentisic acid oxidase deficiency.
Alkaptonuria
Cystinuria
Fabry's disease
Tyrosinemia
Inborn Errors of Metabolism