Which of the following is not a cluster C personality disorder?

• A. Schizoid Personality Disorder
• B. Obsessive-Compulsive Personality Disorder
• C. Avoidant Personality Disorder
• D. Dependent Personality Disorder

Answer: (A)

Cluster C consists of anxious, fearful patterns and includes avoidant, dependent, and obsessive-compulsive personality disorders. Schizoid personality disorder belongs to cluster A, which is characterized by detachment and a lack of interest in social relationships or emotional expression, not by anxiety about social approval or abandonment. That fundamental difference is why schizoid is not a cluster C disorder. The other options fit cluster C because they embody the anxious-fearful pattern: avoidance due to fear of rejection, dependence on others, or rigid perfectionism and control.