<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An 11-year-old girl is brought into the clinic by her parents, who are distraught over her behavior. They state that over the past several months she has started to act oddly, combing the hair of her toy dolls for hours without stopping and repetitively counting her steps in the house. She is often brought to tears when confronted about these behaviors. The patient has no past medical history. When questioned about family history, the mother states she has needed close medical follow-up in the past, but declines to elaborate. The patients vital signs are all within normal limits. On physical exam the patient is a well nourished 11-year-old girl in no acute distress. She has occasional motor tics, but the remainder of the exam is benign. What is the diagnosis in this patient?? A: Autism spectrum disorder ASD, B: Generalized anxiety disorder GAD, C: Obsessive compulsive disorder OCD, D: Tourettes syndrome, E: Major depressive disorder MDD,  <response>: Based on the description of repetitive behaviors like combing dolls hair for hours, counting steps, becoming distressed when confronted about these behaviors, and the presence of motor tics on exam, this patient most likely has obsessive compulsive disorder OCD. The differential diagnosis includes autism spectrum disorder, which can present with repetitive behaviors, but autism usually presents at a younger age and has other features like impaired social interaction. Generalized anxiety disorder may cause distress but does not cause repetitive behaviors. Tourettes syndrome can cause motor tics but does not explain the obsessive compulsive symptoms. Major depressive disorder may explain the distress but not the repetitive behaviors. Therefore, obsessive compulsive disorder is the most likely diagnosis.C: Obsessive compulsive disorder OCD 