<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 19-year-old man presents to the emergency room after a suicidal gesture following a fight with his new girlfriend. He tearfully tells you that she is definitely the one, unlike his numerous previous girlfriends, who were all mean and selfish and with whom he frequently fought. During this fight, his current girlfriend suggested that they spend time apart, so he opened a window and threatened to jump unless she promised to never leave him. You gather that his other relationships have ended in similar ways. He endorses impulsive behaviors and describes his moods as intense and rapidly changing in response to people around him. He often feels depressed for one day and then elated the next. You notice several superficial cuts and scars on the patients arms and wrists, and he admits to cutting his wrists in order to feel something other than my emptiness. Which of the following is the most likely diagnosis for this patient?? A: Bipolar I disorder, B: Bipolar II disorder, C: Borderline personality disorder, D: Histrionic personality disorder, E: Major depressive disorder,  <response>: Based on the information provided in the question stem, the patient exhibits impulsivity, rapidly changing moods, feelings of emptiness, and a pattern of unstable relationships characterized by intense attachment and fear of abandonment. He engages in self-harm behaviors such as cutting and suicidal threats to manipulate his girlfriend into staying with him. This constellation of symptoms and behaviors is most consistent with borderline personality disorder. Bipolar disorder is characterized by distinct episodes of mania and depression, rather than rapidly fluctuating moods. While the patient experiences depressive symptoms, there is no evidence of a major depressive episode. Histrionic personality disorder may present with attention-seeking behaviors but does not account for the mood lability, emptiness, or relational instability described here.C: Borderline personality disorder 