Roger believes he has a special ability. He believes he can read the thoughts of other people and transfer his own thoughts into their mind. There are times when he believes that certain random events and circumstances are directly related to him. On some occasions, he becomes very suspicious of the people around him. Which of the following personality disorders best describes Roger's behavior?

a. Paranoid personality disorder
b. Schizotypal personality disorder
c. Narcissistic personality disorder
d. Borderline personality disorder