Which characteristic is most consistent with borderline personality disorder, as illustrated in clinical vignettes?

• A. Stable and long-term relationships
• B. Emotional instability and unstable relationships with fear of abandonment
• C. Grandiose self-importance without interpersonal conflict
• D. Persistent loss of consciousness

Answer: (B)

Borderline personality disorder is marked by emotional volatility and a pattern of unstable, intense relationships driven by a pervasive fear of abandonment. In clinical vignettes this shows up as rapid mood changes and relationships that swing between idealization and devaluation, with frantic efforts to avoid real or imagined separation. That combination—emotional instability plus unstable relationships and fear of abandonment—best fits the disorder. The other descriptions don’t align: stable long-term relationships don’t reflect the characteristic instability; grandiosity without interpersonal conflict points to narcissistic traits; persistent loss of consciousness is not a feature of this personality pattern.