###Rationale: 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.

###Answer: OPTION C IS CORRECT.
###Question: 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?
###Options:
A. MSUD
B. Isovaleric aciduria
C. Phenyl ketonuria
D. Canavan's disease
