A 30 year old man since 2 months suspects that his wife is having an affair with his boss. He thinks his friend is also involved from abroad and is providing technological suppo. He thinks people talk negatively about him. His friends tried to convince him but he is not convinced at all. Otherwise he is normal, doesn't have any thought disorder or other inappropriate behavior. The most likely diagnosis is which of the following?
Schizophrenia Persistent delusion disorder Paranoid Personality disorder Acute and Transient psychosis