<prompt> A 23 year old engineering student is brought by his family to the hospital with a history of gradual onset of suspiciousness, muttering and smiling without clear reason, decreased socialization, violent outbursts, and lack of interest in studies for 8 months. Mental status examination revealed a blunt affect, thought broadcast, a relatively preserved cognition, impaired judgment and insight. He is most likely to be suffering from -Delusional disorderDepressionSchizophreniaAnxiety disorder  <response>: This patient has:-Delusions of control thought broad castingDisorganized speech mutteringDisorganized behavior smiling without clear reason, violent outburstsNegative symptoms blunted affect, lack of interest, decreased socialization.Duration of 8 monthsDiagnostic criteria for schizophrenia:- Two or more of the following symptoms each should be present for 1 month or more and causing social or occupational dysfunction for 6 months or more.Delusion Hallucinations Disorganized speechDisorganized or catatonic behaviorNegative symptoms Only one of the above is required if delusions are bizarre or there are third person hallucinations. 