This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Child Psychiatry, Subject name: Psychiatry
A girl with normal milestones spends her time seeing her own hand and does not interact with others. What is the likely diagnosis? 
Select and explain. 
A. ADHD, B. Autism, C. Asperger's syndrome, D. Rett's disorder
C: Asperger's syndrome
Answer: C: Asperger's syndrome 
Explanation: The history of restricted behaviors and poor social interaction with normal language milestones is suggestive of Aspergers syndrome Asperger's syndrome: - it is similar to autism i.e. except language dysfunction, both impaired social interaction and restrictive social interaction are seen.