This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inborn Errors of Metabolism, Subject name: Pediatrics
Mental retardation is not a feature in this aminoaciduria: 
Select and explain. 
A. Phenylketonuria, B. Homocystinuria, C. Albinism, D. Maple syrup urine disease
C: Albinism
Answer: C: Albinism 
Explanation: 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.