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 and mutism is 
Select and explain. 
A. Coma, B. Torpor, C. Stupor, D. Twilight state
C: Stupor
Answer: C: Stupor 
Explanation: Stupor  / semicoma is characterized by akinesia(lack of movement) and mutism(decreased nerbal response).