A 60 year old male suffering from auditory hallucination says that people staying upwards are talking about him and conspiring against him. He dropped police complaint against them but the allegations were proved to be wrong. The diagnosis is -
This patient has third person hallucination (voices are talking about the patient) which is characteristic of schizophrenia, and only one characteristic symptom is required for diagnosis if third person hallucination is present.
Depression
Dementia
Delusional disorder
Schizophrenia