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': 'Hallucinations are - \nSelect and explain. \nA. Feeling of familiarity with unfamiliar thing, B. Alteration of perception of ones reality, C. Misinterpretation of stimuli, D. Perception occurring without external stimulation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]