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
[{'content': "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 technical support. He thinks people talk ill about him. His friends tried to convince him but he is not convinced at all. Otherwise, he is normal, he doesn't have any thought disorder or any other inappropriate behavior. The most likely diagnosis is - \nSelect and explain. \nA. Paranoid personality disorder, B. Persistent delusion disorder, C. Schizophrenia, D. Acute and transient psychosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Persistent delusional disorder is characterized by non bizarre delusions (i.e. involving situations that occur in real life e.g. deceived by spouse) of at least 1 month duration (DSM IV) but with absence of :\n\nProminent hallucinations & flattening of affect\nThought disorder, mood disorder, inappropriate behavior\nCognition, memory & consciousness impairment', 'role': 'assistant'}]