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 –a)  SLEb)  Hepatitis A c) Phenylketonuriad)  Rubella 
Select and explain. 
A. ab, B. cd, C. bd, D. ac
B: cd
Answer: B: cd 
Explanation: Microcephaly is defined as a head circumference that measures more than three standard deviation below the mean for age.

Causes of microcephaly