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': 'Perceptional misinterpretation of a real object is \nSelect and explain. \nA. Hallucination, B. Schizophrenia, C. Illusion, D. Delusion', 'role': 'user'}, {'content': "Answer: C \nExplanation: Illusion: Perceptual misinterpretation of a real external stimulus. Reference: Kaplan & Sadock's Synopsis of Psychiatry: Behavioral Sciences/Clinical Psychiatry, 11th Edition, page 1413.", 'role': 'assistant'}]