<prompt> A patient is brought with 6 month history of odd behaviour. There is a history of a family member having disappeared some years back. He seems to be talking to himself and sometimes muttering to himself loudly. The likely diagnosis is -SchizophreniaConversion disorderMajor depressionDelusion  <response>: This patient is having:-Disorganized behavior thinking talking to himselfDisorganized speech muttering to himself loudlySymptoms for 6 monthsDiagnostic criteria for schizophrenia:- 2 or more of the following features each present for more than 1 month, causing social or occupational dysfunction for more than 6 months:-1 Hallucinations; 2 Delusions; 3 Disorganized speech; 4 Disorganized or catatonic behavior; and 5 Negative symptoms. 