<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 5-year-old girl is brought to the physician because her mother has found her to be inattentive at home and has received multiple complaints from her teachers at school. She does not complete her assignments and does not listen to her teachers instructions. She refuses to talk to her parents or peers. Her mother says, She ignores everything I say to her! She prefers playing alone, and her mother reports that she likes playing with 5 red toy cars, repeatedly arranging them in a straight line. She avoids eye contact with her mother and the physician throughout the visit. Physical and neurological examination shows no abnormalities. Which of the following is the most likely diagnosis?? A: Attention deficit hyperactivity disorder, B: Oppositional defiant disorder, C: Autism spectrum disorder, D: Conduct disorder, E: Rett syndrome,  <response>: Based on the information provided in the question stem, the key findings are:- 5-year-old girl is inattentive at home and school- Does not complete assignments or listen to teachers- Refuses to talk to parents or peers- Prefers playing alone, specifically arranging 5 red toy cars in a line repeatedly - Avoids eye contact- Physical and neurological exams are normalThese symptoms are highly suggestive of autism spectrum disorder, particularly the repetitive play behavior, lack of social interaction, and avoidance of eye contact. The lack of hyperactivity makes ADHD less likely. The absence of defiant, aggressive or rule-breaking behaviors makes oppositional defiant disorder and conduct disorder unlikely. Rett syndrome is a genetic disorder primarily affecting girls that has distinct features not described here.C: Autism spectrum disorder 