True regarding galactosemia
Mental retardation occurs
Defect in epimerase
Defect in galactose 1PO4 uridyl transferase
All the above
Inability to metabolise galactose occurs in galactosemia which may be caused by deficiency of galactose-1-phosphate uridyl transferase,UDP-Galactose-4-Epirnerase and galactokinase.
Out of three, most common is Galactose =1-phosphate uridyl transferase deficiency.