Mental retardation is not a feature in this aminoaciduria:
c. Albinism(Ref: Nelson's 20/e p 636-642, Ghai 8/e p 653-655)Intellectual disability is common in Phenylketonuria, Homocystinuria and MSUD.
Phenylketonuria
Homocystinuria
Albinism
Maple syrup urine disease
Inborn Errors of Metabolism