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': 'All of the following feature of hallucination EXCEPT? \nSelect and explain. \nA. Depends on will of observer and is under voluntary control, B. Occur in inner subjective space, C. It is vivid as sensory perception, D. It occurs in absence of perceptual stimulus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Depends on will of observer', 'role': 'assistant'}]