This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
All of the following are cluster A personality disorders except: 
Select and explain. 
A. Schizoid personality disorder, B. Schizotypal personality disorder, C. Paranoid personality disorder, D. Avoidant personality disorder
D: Avoidant personality disorder
Answer: D: Avoidant personality disorder 
Explanation: Avoidant personality disorder is a cluster C personality disorder.