This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basics of Psychiatry, Subject name: Psychiatry
The following is suggestive of an organic cause of behavioral symptoms: 
Select and explain. 
A. Formal thought disorder, B. Auditory hallucinations, C. Delusion of guilt, D. Prominent visual hallucinations
D: Prominent visual hallucinations
Answer: D: Prominent visual hallucinations 
Explanation: The presence of prominent visual hallucinations is a strong pointer towards an organic cause (i.e. a disturbance of brain parenchyma such as tumors). Although visual hallucinations can occur in schizophrenia, however, they are not as common as auditory hallucinations. Formal thought disorders are characteristic of schizophrenia. Delusion of guilt can be a feature of schizophrenia or depression with psychotic symptoms.