A 60 year old man is brought to a psychiatrist with a 10 year history, that the suspects his neighbours and he feels that whenever he passes by they sneeze and plan against behind his back.He feels that his wife has been replaced by a double and call police for help.He is quite well groomed alert, occasionaly consumes alcohol, likely diagnosis is -

• A. Paranoid schizophrenia
• B. Paranoid personality
• C. Conversion disorder
• D. Alcohol withdrawl