This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia Spectrum and Other Psychotic Disorders, Subject name: Psychiatry
[{'content': 'Which statement is not true about hallucinations? \nSelect and explain. \nA. It is as vivid as a real perception, B. It occurs in inner subjective space, C. It is independent of will of observer, D. It occurs in the absence of any perceptual stimulus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Criteria for hallucination Occur in the absence of any object or stimulus Hallucination are as vivid as a real perception Occur in outer and objective space Not in the control of patient Inner & subjective space - pseudo hallucination M/c hallucination - auditory hallucination Tactile hallucination is seen in cocaine intoxication known as cocaine bug or formication or Mangan phenomenon', 'role': 'assistant'}]