Which of the following symptom is likely to be of organic origin?

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