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
Akinesia (hypoactivity) and mutism is a feature of 
Select and explain. 
A. Twillight state, B. Stupor, C. Cataplexy, D. Torpor
B: Stupor
Answer: B: Stupor 
Explanation: Akinesia + Mutism is a feature of stupor, which is seen in catatonic schizophrenia or catalepsy.
Option c : Cataplexy is sudden loss of muscle tone seen in Norcolepsy, which is not a correct answer.