<prompt> Sudden onset of hallucinations in a 35 year old man with no previous history family history of schizophrenia may be due to -Substance abuseSchizophreniaFrotterismDepression  <response>: This patient has -Sudden onset of hallucinationPrevious history negative Patient was normal before onset of hallucinationRelevant family historyIn Schizophrenia, Sudden onset of hallucination may be the first symptom and patient may have a positive family history.About other options In depression, there should be a history of depressive symptoms before the onset of hallucination.In substance abuse, there should be a history of substance abuse. 