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
Which of the following symptom is likely to be of organic origin? 
Select and explain. 
A. Delusion of guilt, B. Auditory hallucinations, C. Formal thought disorder, D. Prominent visual hallucination
D: Prominent visual hallucination
Answer: D: Prominent visual hallucination 
Explanation: 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