<prompt> Which of the following symptom is likely to be of organic origin?Delusion of guiltAuditory hallucinationsFormal thought disorderProminent visual hallucination  <response>: Organic brain syndromes are characterized by visual hallucinations, in distinction to schizophrenia which is characterized by auditory hallucinations. However 5 of Schizophrenics presents with visual hallucinations. Delusion of guilt is indicative of severe depression. Ref: The Patient: Biological, Psychological and Social Dimensions of Medical Disorders By Hoyle Leigh, Pages 191-192 