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: Psychiatry
Regarding Rett's syndrome false is 
Select and explain. 
A. Microcephaly at birth, B. X - linked, C. Poor social interaction, D. Stereotypical hand movements
A: Microcephaly at birth
Answer: A: Microcephaly at birth 
Explanation: Head circumference is normal at birth. It starts to regress later.