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 acitivity, waxy flexinbility 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: C. i.e. Catatonic schizophrenia