<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 20-year-old man comes to the physician because he believes he has low testosterone. He states that he is embarrassed at his lack of musculature, despite lifting weights twice daily. Every day, he drinks a gallon of milk and several protein shakes in addition to 3 large meals. He is convinced that his female classmates at the community college he attends are secretly laughing at his scrawny appearance. Over the course of the semester, he has attended fewer and fewer classes out of embarrassment and shame. He is also concerned that his hair is thinning and applies topical minoxidil to his scalp 3 times daily. He spends 2 hours daily anxiously examining himself in the mirror. Today, he is wearing a long-sleeved shirt and a hat. His BMI is 26 kgm2. Physical examination shows no abnormalities. On mental status examination, he has an anxious mood and a full range of affect. Serum studies show a normal testosterone concentration. Which of the following is the most likely diagnosis?? A: Avoidant personality disorder, B: Body dysmorphic disorder, C: Obsessive compulsive disorder, D: Binge eating disorder, E: Generalized anxiety disorder,  <response>: This is a clinical vignette describing a 20-year-old man with concerns about his physical appearance and musculature. He is engaging in obsessive behaviors such as drinking excessive protein shakes, applying minoxidil, and spending hours examining himself in the mirror. He is avoiding social situations due to feelings of embarrassment and shame about his appearance. On exam, he has an anxious mood but normal testosterone levels. The key features here are his preoccupation with his appearance, distorted self-image, and repetitive behaviors aimed at improving his musculature despite having a normal BMI. This fits with body dysmorphic disorder, which is characterized by excessive preoccupation with perceived flaws in physical appearance. The other options do not fit as well with the details provided.B: Body dysmorphic disorder 