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
In which of the following state, a person is mute and akinetic, but can be awaken and even be ale? 
Select and explain. 
A. Stupor, B. Delirium, C. Twilight state, D. Oneroid state
A: Stupor
Answer: A: Stupor 
Explanation: Stupor refers to a higher degree of arousability in which the patient can be transiently awakened only by vigorous stimuli, accompanied by motor behavior that leads to avoidance of uncomfoable or aggravating stimuli. Ref: Harrison's Principles Of Internal Medicine 18th edition chapter 274; Localization of Clinical Syndromes in Neuropsychology and Neuroscience By Joseph M. Tonkonogy, page 266.