<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A mother brings her 3-year-old son to the doctor because she is worried that he might be harming himself by constantly banging his head on the wall. He has been exhibiting this behavior for a few months. She is also worried because he has started to speak less than he used to and does not respond when his name is called. He seems aloof during playtime with other children and seems to have lost interest in most of his toys. What is the most likely diagnosis?? A: Attention deficit hyperactivity disorder, B: Generalized anxiety disorder, C: Bipolar disorder, D: Obsessive-compulsive disorder, E: Autism spectrum disorder,  <response>: This question describes a 3-year-old boy who is banging his head on the wall, speaking less, not responding to his name, seeming aloof during playtime, and losing interest in toys. These are symptoms often associated with autism spectrum disorder in young children. Head banging and decreased speech can indicate repetitiverestrictive behaviors. Lack of response to name, aloofness, and loss of interest in toys can indicate problems with social interaction and communication. Therefore, the most likely diagnosis based on the symptoms described is autism spectrum disorder.E: Autism spectrum disorder 