<prompt> A 2-year-old intellectutually disabled child is having blue eyes, blonde hair and fair skin. He also have a peculiar body odour. What is the diagnosis?MSUDIsovaleric aciduriaPhenyl ketonuriaCanavans disease  <response>: Ans. C. Phenyl ketonuriaIdentifying features: Blue eyes, blonde hair and fair skin is a classical description of a case of PKU. The child is intellectually disabled and they have mousy body odour. 