<prompt> A 28 year old female presents with complains of reduced sleep with disorganized behaviour for 9 months. She feels there is a camera fixed behind her head which always follows her. Which of the following is likely diagnosis -Psychotic depressionParanoid schizophreniaDelusional disorderInsomnia  <response>: The patient in question has : -Symptoms for 9 monthsDisorganized behaviourDelusions Camera is fixed behind her headSo, the patient fits into the diagnostic criteria of schizophrenia, i.e. two or more following symptoms i Delusions; ii Hallucinations; iii Disorganized speech; iv disorganized or catatonic behavior; v Negative symptoms. 