<prompt> Which of the following behavioral problems would suggest an organic brain lesion :Visual hallucinationsFormal thought disorderAuditory hallucinationsDepression  <response>: While the majority of hallucinations reported in primary psychotic disorders are auditory, they may also be visual, olfactory, tactile, or gustatory.Visual hallucinations have been reported in 16 72 of patients with schizophrenia and schizoaffective disorder. 