This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Features like increased psychomotor activity, waxy flexibility at time are seen classically in - 
Select and explain. 
A. Simple schizophrenia, B. Hebephrenic schizophrenia, C. Catatonic schizophrenia, D. None of the above
C: Catatonic schizophrenia
Answer: C: Catatonic schizophrenia 
Explanation: None