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
[{'content': 'Akinesia and mutism is \nSelect and explain. \nA. Coma, B. Torpor, C. Stupor, D. Twilight state', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Stupor\xa0 / semicoma is characterized by akinesia(lack of movement) and mutism(decreased nerbal response).', 'role': 'assistant'}]