This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'True regarding galactosemia \nSelect and explain. \nA. Mental retardation occurs, B. Defect in epimerase, C. Defect in galactose 1PO4 uridyl transferase, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.\nOut of three, most common is Galactose =1-phosphate uridyl transferase deficiency.', 'role': 'assistant'}]