**Core Concept**
The prognosis of schizophrenia varies depending on the subtype, with certain types having a worse outcome than others. The subtype of schizophrenia is often classified based on the presence and severity of negative symptoms, such as apathy, social withdrawal, and poverty of speech.

**Why the Correct Answer is Right**
The worst prognosis is seen in the **Catatonic Type** of schizophrenia. This subtype is characterized by marked psychomotor disturbances, including immobility, rigidity, and mutism. Catatonic schizophrenia often has a more severe course, with a higher risk of poor response to treatment and a greater likelihood of requiring long-term institutional care. The pathophysiology of catatonia involves abnormalities in the dopamine and glutamate systems, which may contribute to its poor prognosis.

**Why Each Wrong Option is Incorrect**
**Option A:** **Disorganized Type** schizophrenia has a relatively better prognosis compared to catatonic schizophrenia, with a higher likelihood of response to antipsychotic treatment and a lower risk of long-term institutionalization. However, it still has a worse prognosis than the **Paranoid Type**.
**Option B:** **Paranoid Type** schizophrenia has a relatively better prognosis compared to catatonic schizophrenia, with a higher likelihood of response to antipsychotic treatment and a lower risk of long-term institutionalization.
**Option C:** **Undifferentiated Type** schizophrenia has a variable prognosis, but it is generally better than catatonic schizophrenia.

**Clinical Pearl / High-Yield Fact**
Catatonic schizophrenia often requires a combination of antipsychotic medication and electroconvulsive therapy (ECT) for effective treatment. It is essential to recognize the presence of catatonia early in the course of the illness to provide timely and appropriate treatment.

**Correct Answer:** C. Undifferentiated Type