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
Formed visual hallucinations are seen in lesions of: 
Select and explain. 
A. Frontal lobe, B. Temporal lobe, C. Occipital lobe, D. Parietal lobe
B: Temporal lobe
Answer: B: Temporal lobe 
Explanation: The lesions of temporal lobe can cause all types of hallucinations (auditory, visual, olfactory etc). Formed visual hallucinations are elaborate visual hallucinations (e.g a patient may repo seeing a tree with green leaves which has a parrot sitting and a man standing near it) . The presence of elaborate visual hallucinations should raise a strong doubt of an organic cause (i.e. a pathology of brain parenchyma), specifically a temporal lobe pathology.