<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 14-year-old boy is brought in to the clinic by his parents for weird behavior for the past 4 months. The father reports that since the passing of his sons pet rabbit about 5 months ago, his son has been counting during meals. It could take up to 2 hours for him to finish a meal as he would cut up all his food and arrange it in a certain way. After asking the parents to leave the room, you inquire about the reason for these behaviors. He believes that another family member is going to die a terrible death if he doesnt eat his meals in multiples of 5. He understands that this is unreasonable but just cant bring himself to stop. Which of the following abnormality is this patients condition most likely associated with?? A: Atrophy of the frontotemporal lobes, B: Atrophy of the hippocampus, C: Decreased level of serotonin, D: Enlargement of the ventricles, E: Increased activity of the caudate,  <response>: Based on the description, the patient is exhibiting symptoms of obsessive-compulsive disorder OCD. The repetitive counting and arranging of food as well as the irrational belief that something bad will happen if he doesnt perform these rituals are classic signs of OCD. The onset after a stressful event the death of his pet is also common in OCD. E: Increased activity of the caudate 