<prompt> A 25 year old girl was brought to the emergency after taking overdose of clonazepam after having an argument with her fiance. On taking history revealed that she had many previous relationships which didnt lasted long. And there was history of similar such incidents in the past and she also has cut marks over her wrist. Which of the following is the most likely diagnosis?Narcissistic personality disorderBorderline personality disorderHistrionic personality disorderAnxious personality disorder  <response>: Ans. B. Borderline personality disorderIt is characterized by Unstable interpersonal relationships - alternating between extremes of idealization and devaluation. Identity disturbance: markedly unstable self-imagesense of self. Impulsivity - potentially self-damaging e.g., spending, sex, substance abuse, reckless driving, binge eating Recurrent suicidal behavior, gestures, or threats, or self-mutilating behavior. Affective instability due to a marked reactivity of mood intense episodic dysphoria, irritability, anxiety Chronic feelings of emptiness. Inappropriate, intense anger or difficulty controlling anger Transient, stress-related paranoid ideation, severe dissociative symptoms 