A nurse is discussing the three discussing the three clusters of personality disorders with colleagues. Which personality disorder is classified as part of Cluster C?

Choice A reason: Paranoid personality disorder belongs to Cluster A, characterized by odd, eccentric traits and dopamine-driven mistrust in the prefrontal cortex and amygdala. Cluster C involves anxiety-driven disorders, not paranoia, which aligns with hypervigilance but lacks the submissive or avoidant features of Cluster C, making this incorrect. Choice B reason: Antisocial personality disorder is Cluster B, marked by impulsivity and aggression due to low serotonin and prefrontal cortex deficits. Cluster C focuses on anxiety and fear, not rule-breaking or manipulation, which are driven by different neurobiological pathways, including mesolimbic dopamine, making this option incorrect. Choice C reason: Borderline personality disorder is Cluster B, involving emotional instability and serotonin/dopamine imbalances in the amygdala and prefrontal cortex. Cluster C emphasizes anxiety and dependency, not intense interpersonal volatility, which contrasts with borderline’s chaotic relationships, making this disorder misaligned with Cluster C criteria. Choice D reason: Dependent personality disorder, part of Cluster C, features anxiety and submissiveness, driven by serotonin deficits and amygdala hyperactivity. This aligns with Cluster C’s neurobiology, emphasizing fear of abandonment and reliance on others, modulated by prefrontal cortex dysregulation, making it the correct classification for this cluster.