This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms and signs in psychiatry and classification, Subject name: Psychiatry
[{'content': 'Hallucinations are \nSelect and explain. \nA. Feeling of familiarity with unfamiliar thing, B. Alteration of perception of one reality, C. Misinterpretation of stimuli, D. Perception occurring without external stimulation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hallucination A hallucination is a perception experienced in the absence of an external stimulus. The hallucinations can be in the auditory, visual, olfactory, gustatory or tactile domains. Auditory hallucinations are commonest types of hallucinations in non-organic psychiatric disorders. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 13', 'role': 'assistant'}]