ICD 10 to demonstrate the relationship: Let say; the (F20-F29) Schizophrenia, schizotypal and delusional disorders : ( F 20. ) Schizophrenia ( F 20.0 ) Paranoid schizophrenia ( F 20.1 ) Hebephrenic schizophrenia ( F 20.2 ) Catatonic schizophrenia ( F 20.3 ) Undifferentiated schizophrenia ( F 20.4 ) Post-schizophrenic depression (