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
Which of the following disorder of mother leads to microcephaly in baby - 
Select and explain. 
A. SLE, B. Hepatitis A, C. Phenylketonuria, D. All
C: Phenylketonuria
Answer: C: Phenylketonuria 
Explanation: Ans. is 'c' i.e., Phenylketonuria Microcephaly o Microcephaly is defined as a head circumference that measures more than three standard detion below the mean for age. Causes of microcephaly Primary (genetic) Secondry (Nongenetic) o Familial (autosomal recessive) o Radiation o Autosomal dominant o Alcohol o Down syndrome o Phenytoin o Edward syndrome o Infection ---> Rubella, CMV, Toxoplasma