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
Mutism and akinesis in a person who appears awake and even alerts is best described as 
Select and explain. 
A. Twilight state, B. Stupor, C. Oneroid state, D. Delirium
B: Stupor
Answer: B: Stupor 
Explanation: Stupor : Akinesis (no movement) with mutism but with evidence of relative preservation of conscious awareness.