This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia and other psychotic disorders, Subject name: Psychiatry
Schizophrenia with the worst prognosis 
Select and explain. 
A. Catatonic, B. Paranoid, C. Hebephrenic, D. Undifferentiated
C: Hebephrenic
Answer: C: Hebephrenic 
Explanation: Hebephrenic schizophrenia Key Symptoms: Disorganized speech, behavior (often silly/ shallow) and flat or inappropriate affect Order of prognosis from good to bad in Schizophrenia: Catatonic > Paranoid > Undifferentiated > Hebephrenic > Simple Reference: Oxford Handbook of psychiatry; 3rd edition; Chapter 6; Schizophrenia and related psychoses