<prompt> Waxy flexibility and stereotype verbal and behavioural signs are seen inParanoid schizophreniaHebephrenic schizophreniaCatatonic schizophreniaSimple schizophrenia  <response>: Ans. c Catatonic schizophrenia. Ref. Psychiatry by Niraj Ahuja, 5th ed., 60, 254Schizophrenia: Symptoms must be present at least 6 monthsSchizophreniform Disorder: 1 month but 6 months.FEATURES OF CATATONIC SCHIZOPHRENIA Bizarre posturing Rigidity Echolalia, echopraxia Mutism Waxy flexibility Ambitendancy no goal directed actions Stupor Negativism motiveless resistance to all commands and doing opposite Other signs mannerisms, stereotype verbal and behavioural automatic obedience, verbigerationTYPES OF SCHIZOPHRENIA Schizophrenia Paranoid Type MC Type of Schizophrenia Older patients Onset is in their late twenties or thirtiesBest prognosis Presenting Symptoms: Preoccupation with delusions andor hallucinations, usually involving grandeur or persecution.Schizophrenia Disorganized Type Presenting Symptoms: Disorganized speech and behavior. Flat or inappropriate affect. Marked regression to primitive disinhibited behavior Bizarre Behavior. Severe thought disorder. Poor contact with reality Risk Factors: These patients tend to be younger than 25Worst prognosis.Schizophrenia Catatonic Type Presenting Symptoms: Psychomotor Disturbances, ranging from severe retardation to excitation. Extreme negativism. Peculiarities of voluntary movements. Mutism is very common. Complications: Medical care may be necessary because of exhaustion, malnutrition, self- inflicted injury, or hyperpyrexia.Schizophrenia Residual Type Presenting Symptoms: Absence of positive symptoms delusions, hallucinations, disorganized speechbehavior catatonic behavior. Patients tend to have negative symptoms Social Withdrawal, Flat Affect, Occupational Dysfunction.Schizophrenia Undifferentiated Type Presenting Symptoms: Meet criteria for schizophrenia. Do not meet criteria for other schizophrenia types. 