Which of the following is NOT a personality disorder in Cluster A?

The correct answer is based on the classification of personality disorders as described in the DSM-5, which organizes these disorders into three clusters: A, B, and C.

Cluster A personality disorders are characterized by odd or eccentric behaviors. The disorders included in this cluster are:

1. Paranoid Personality Disorder: Marked by a pervasive distrust and suspicion of others.

2. Schizoid Personality Disorder: Characterized by a lack of interest in social relationships, a tendency towards a solitary lifestyle, and a limited range of emotional expression.

3. Schizotypal Personality Disorder: Involves acute discomfort in close relationships, cognitive or perceptual distortions, and eccentric behavior.

Histrionic Personality Disorder, on the other hand, belongs to Cluster B. This cluster is characterized by dramatic, emotional, or erratic behaviors. Histrionic Personality Disorder specifically is characterized by excessive attention-seeking behaviors, emotionality, and a need for approval.

Thus, recognizing that Histrionic is associated with Cluster B helps differentiate it from the other disorders listed, which all belong to Cluster A. This clear distinction in the classification of personality disorders is what makes Histrionic the correct answer to the question.