cluster B personality types

cluster B personality types include narcissism, borderline personality disorder, antisocial personality disorder, histrionic personality disorder, etc. Impulsive and unpredictable personalities, as opposed to cluster A and C personalities, which tend to be odd and eccentric (A), or anxious and scared (C). In my opinion, the most dangerous personality disorders are probably cluster B.

Person A: "Did you see Cory? He faked a broken leg for attention, he's been moaning and groaning about it all day long, but, he's actually perfectly fine!"
Person B: He always acts out like this for attention and disrupts his classmates. The school psychologist said he could have a cluster B personality disorder, like histrionic personality disorder.
Person A: "I heard that cluster B personality types tend to be described as impulsive and unpredictable in the DSM 5. "
Person B: "Yep, I hope he grows out of it."