Which of the following inborn errors of metabolism is associated with mental retardation –a)  Alkaptonuriab)  Homocystinuriac)  Pentosuriad)  Galactosemia
(A) c (B) d (C) bd (D) ac
(C) Metabolic disorders associated with mental retardation.

Aminoaciduria —› Phenylketonuria, homocystinemia, histidinemia
Galactosemia
Mucopolysaccharidosis