A 19 year old man presents for the 1st time with a firm and unshakable belief that he is being followed by terrorists who are plotting against him. What is the single best term for this man’s condition?

The key is A. Delusion of persecution. [Delusions of persecution refer to false beliefs or perceptions

in which a person believes that they are being treated with malicious intent, hostility, or harassment –

despite significant evidence to suggest otherwise].